Milestone Celebration

This was meant to be the 100th update.
Valve Time happened.

"I will not celebrate meaningless milestones."

— Bart's chalkboard gag, The Simpsons, "Sweet Seymour Skinner's Baadasssss Song" (100th episode)

Show pilots are a very tricky process. They are made, and even if they get a chance on the air, the vast majority of them fail within a few weeks. With other shows, they will sometimes build up a dedicated audience that will fail to keep the show alive long enough. Most of the time.

Most full television seasons are between 20 and 26 episodes long. There are various exceptions; shows can run from 13 episodes to well over 40 episodes. With such a vicious market, the ability to reach the 100 episode mark is a rare and coveted thing. So when a show does achieve that milestone, they plan something big to not only draw ratings, but to break out into the three-digit episodes.

Part of the celebration is that pure money is offered with syndication rights, which a general rule of thumb is to have 100 episodes to air in certain time slots like Nick at Nite does. Because the show was already financed and produced, this will bring in the nostalgic viewers without much effort.

This is not inherently just for television series, but any property that has had a consistent run will either celebrate the installment count or in the form of "10 Year Anniversary." This will often coincide with the Very Special Episode, but it could also be Tonight, Someone Dies or a Continuity Cavalcade with Internal Homage, especially when elements (or even the entire plot) of the series' first installment is directly recreated. It may avoid all of that and the installment is just given an additional polishing to make it one of the best episodes of the series.

But no matter what, remaining in the public view for years is an impressive event in any form of media.

Compare Meaningful Release Date. Not to be confused with Milestone Birthday Angst, which is when a character dreads a specific milestone age.

Remember, Examples Are Not Recent.

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Examples

• Anime & Manga
• Comic Books
• Film
• Live-Action TV
  • Doctor Who
• Video Games
• Western Animation

Audio Play

• To celebrate the tenth anniversary of The Confessions of Dorian Gray not only was a special audio titled The Anniversary made, but a ten minute long Live-Action Adaptation of the series was made with Alexander Vlahos reprising his role as the main character.

Asian Animation

• In March 2021, 10 years after BoBoiBoy's first episode aired, the studio uploaded an extended version of that episode. It adds a newly animated prologue and epilogue featuring the then-recently revealed Amato and MechaBot, the former being BoBoiBoy's loving father who was all but absent to the audience until then due to his space superhero job, as well as remakes of the show's Theme Tune and credits song. The theme song sounds more energetic, while the formerly energetic credits song is done in a slower, nostalgic ballad style with an Art Shifted credits sequence depicting moments to come later in the series.
• To celebrate Pleasant Goat and Big Big Wolf's 10th anniversary, Amazing Pleasant Goat, the seventh film in the show's film series, has a scene right at the end of the film where the characters wish the series a happy 10th anniversary. The film released the year of the celebration, 2015.

Fan Works

• Blackened Skies offers an in-universe example. Monokuma claims that one of the murders counts as the 50th murder he's overseen. In order to mark the occasion, he gives the killer an extra advantage by knocking everyone else out for fifteen minutes.
• The Bridge's second anniversary featured an animated Q&A video. Unfortunately, it was released a month late due to technical difficulties. For the seventh aniversary, the author wrote the fun spin-off The Bridge: Birthday Bash! Chibi Moon's Quest For Cake!
• Calvin & Hobbes: The Series has an in-universe example in "The Case of the Rogue Water Balloon", wherein G.R.O.S.S. celebrates its second anniversary and its 500th water balloon attack.
• Chasing Dragons:
  • For the yearly anniversaries of when the story began, the author posts snippets of in-universe media from the far future of the timeline (roughly equivalent to the modern real world).
  • The 100th chapter isn't a story post, but rather an appendix listing all the major characters, organizations, and conflicts (as of that writing).
• For the Glory of Irk:
  • To celebrate the one-year anniversary of the story first being published, the author did a Q&A session with the readers, opening the reviews/comments to questions in Chapter 53 and posting answers in Chapter 54.
  • After the main story was wrapped up, the author did another Q&A session at the end of the bonus Chapter 67.
  • For the one year anniversary of the story's official completion, the author posted a two-part special event chapter.
• A significant chapter of Mega Man Reawakened was posted just before the fic's second anniversary.
• Naru-Hina Chronicles:
  • In this webcomic that's in black and white, pages that reach to any multiple of 1000 are usually fully colored.
  • For the 100th chapter, mattwilson83 (the creator of NHC) decided to have it be completely inked.
  • In regards to Naru-Hina Chronicles Mini-sodes: The 50th Mini-sode had its first panel entirely in color. For the 100th, the entire Mini-sode was in color. For the 200th, not only is it twice the length of other Mini-sodes, but it shows Naruto and Hinata meeting Naruko and Hinago from the gender-reversed alternate universe for the first time, while also introducing Naruko and Hinata from the second AU, AKA the Yuri-verse.
• There is a thread and a story commemorating the second anniversary of The (Not So) Cynical Creators Guild group on Fimfiction.net.
• Chapter 50 of The Parselmouth of Gryffindor is something of a Wham Episode: Harry and Snape see Lily again thanks to the Resurrection Stone, and it ends on the Cliffhanger of Mad-Eye Moody announcing that "Azkaban has fallen".
• The writers of the Expanded Universe of Pokémon Reset Bloodlines have occasionally made a few of these. Viroro-kun's Dude Gaiden celebrates both his first anniversary and it is the 50th sidestory to be posted, while partner555 and Fox McCloude followed suit with the Jane Jackrum Interlude and the Sir Aaron & Lucario Gaiden respectively for their own anniversaries. Later, the collaborative 100th Sidestory Special - The Glitch War celebrates Exactly What It Says on the Tin^*While it's not the 100th sidestory to be posted overall, it is the 100th that takes place in the main timeline, since there are two that came prior that take place in alternate timelines.
• Starting with Episode 50 ("The Pokémon Squad Movie"), The Pokémon Squad would have one of these every 25 episodes, always a Whole-Plot Reference to a real movie. In particular, Episodes 100 and 200 ("The Ketchums Movie" and "Prehistoric Pokémon Park", respectively) also have Q&A sessions at the beginning.
• The PreDespair Kids "celebrated" reaching its 1000th page by truly taking after its source material with a true Wham Episode: Hiyoko is found murdered in the gym and an investigation takes place involving all the characters, both canon and original.
• Sonic the Comic – Online!:
  • Issue 261 celebrated the 20th anniversary of the original Sonic the Comic by having an action packed issue featuring numerous cameos from older and oneshot characters.
  • One of the original Sonic the Comic writers, Nigel Kitching, wrote a special issue for Sonic the Comic Online in order to celebrate the 25th anniversary. It's set in an unmentioned amount of years in the future and has the Freedom Fighters on one last fight against Super Sonic, Dr. Robotnik, and Grimer.

Literature

• The Mr. Men and Little Miss books celebrated their 35th (Mr. Men) and 25th (Little Miss) anniversaries with "Mr. Birthday" and "Little Miss Birthday".
• In honor of Noddy's 60th Anniversary in 2009, a new book was written◊ called Noddy and the Farmyard Muddle written by Enid Blyton's granddaughter, Sophie Smallwood. The book was also illustrated by Robert Tyndall, who has drawn the characters in the Noddy books since 1953◊. That same year, a second CGI series starring Noddy called "Noddy In Toyland" also premiered in the UK in April 2009. France honored the character's 60th anniversary by creating a musical called Oui-Oui Et Le Cadeau Surprise (Noddy And The Surprise Gift) which involves Mr. Plod, Mr. Wobblyman, Tessie, Dinah, and Whizz planning a surprise birthday party for Noddy. By the end of the show, Noddy even invites Sly and Gobbo to his birthday celebration. In addition to the series' 60th Anniversary, a biopic about Enid Blyton, titled Enid, was aired on BBC Four, briefly touching on the creation of the series.
• The 1111th and the 2222nd volume of the long-running weekly German Sci-Fi series Perry Rhodan were both quite nice in-character and in-continuity parodies of the series, both written by Horst Hoffmann, who went on to announce his retiring from being a regular author.
• Sweet Valley High celebrated its 100th book (well, actually its 97th through 100th) with its first Story Arc, a Genre Shift to horror. It worked surprisingly well, leading to more story arcs and more fantastical story elements in the future.
• Return to Firetop Mountain celebrated both the 50th installment in the Fighting Fantasy series and the 10th anniversary of the publishing of the first book. It took the reader back to the same dungeon of the original The Warlock of Firetop Mountain to defeat a resurrected Zagor.
• Pan Books commissioned And Another Thing... for the 30th anniversary of the publication of The Hitchhiker's Guide to the Galaxy.
• The tenth anniversary of Warrior Cats in 2013 marks the release date of the prequel series Warrior Cats: Dawn of the Clans.
• Charlie and the Chocolate Factory's 50th anniversary in 2014 ("50 Whipple-Scrumptious Years") was marked with a variety of events and offerings. This milestone celebration specifically kicked off on January 31st, since that's the day Charlie finds his Golden Ticket in the novel.
  • Penguin Books added the novel to their adult-oriented Penguin Modern Classics line — a ploy that went awry due to its unique, controversial cover featuring a girl with creepy makeup and dress.
  • The novel had several kid-friendlier anniversary editions published too, including deluxe reissues of both the Joseph Schindelman and Quentin Blake-illustrated editions — the latter in full-color for the first time.
  • The retrospective book Inside Charlie's Chocolate Factory was published.
  • There were contests in the U.S. and U.K., and the annual Puffin Virtually Live school webcast that marks Roald Dahl's birthday was centered on the book.
  • While the 2013 West End stage musical adaptation of the novel was not specifically launched to tie in to the anniversary, it was incorporated into several of the U.K.-based events, such as the aforementioned webcast and an Easter-season window display at the Piccadilly Circus Waterstone's bookstore that recreated its sets and characters in miniature via decorated chocolate biscuits. "Celebrate Fifty Years of Pure Imagination" was a tagline for the show for a while too.
• James Bond novel Devil May Care was released on the hundreth anniversary of the birth of Ian Fleming, the creator of the character.
• Life and Death, a Gender Flipped retelling of Twilight, was released in celebration of the 10th anniversary of Twilight.
• The Further Adventures of Batman: The first anthology was written to celebrate the fiftieth anniversary of the Batman multimedia franchise.
• The Wings of Fire series never had any official milestone commemoration(s) in all technicality, though Cole S. Sieben's all-encompassing series introduction "Mastery of Morality and Wings of Fire" was purposefully released on the books' tenth anniversary.
• The Hunger Games: The Quarter Quells are an In-Universe example. Every twenty-five years, a one-off twist is introduced to remind the people living in the districts of why the titular Games exist and of the Capitol's continuing power over them, with the nature of the Quell being announced by Panem's president months in advance. A large number of these Quells spanning hundreds of years were planned, but only three actually took place and only the first two were played out to the end. The third Quarter Quell takes place during the events of Catching Fire, but the Games are cut short with six tributes still alive.

Magazines

• The 40th anniversary issue of People magazine had Taylor Swift on their cover, making an identical pose◊ to Mia Farrow on the magazine's first cover◊.

Music

• Many artists celebrate anniversaries of their best known albums by rereleasing them in remastered or upgraded versions. Whole catalogues can get this treatment at times (such as John Lennon's catalog in 2010, coinciding with what would've been his 70th birthday).
• The Beatles released their Greatest Hits Album 1, with all their number one hits, on the 30th anniversary of their break-up in 2000.
• The Rolling Stones:
  • They celebrated 40 years with Forty Licks, a Greatest Hits Album that as the title indicates had 40 tracks (4 of them new) in 2002. 10 years later, in 2012, they did the same with the 50-track (two of them new, and one of the old ones being from Forty Licks) GRRR!. In July 2023, to mark Mick Jagger's 80th birthday, Forty Licks got re-released on vinyl and digital.
  • In October 2021, to mark Tattoo You's 40th anniversary, it was re-released with 9 unreleased tracks and a live album recorded at Wembley Stadium in 1982. It also served as a tribute to drummer Charlie Watts, who passed away at age 80 on August 24, 2021, exactly 40 years after the album was first released.
• Pearl Jam celebrated 20 years of debut album Ten with the documentary Pearl Jam Twenty and re-releases with extra discs.
• Blur released a box set containing all of their albums for the 21st anniversary of their first one.
• Michael Jackson examples:
  • He threw two all-star tribute concerts to himself at Madison Square Garden in September 2001 to mark the 30th anniversary of his first release as a solo artist, though these and remastered/mostly expanded reissue of his first four albums for Epic Records was more to promote his forthcoming Invincible than anything.
  • In 2007, Thriller 25 was a second expanded reissue of that particular album that added new versions of several tracks, pairing Jackson up with contemporary hitmakers. In 2022, Thriller 40 was announced to celebrate the album's forthcoming 40th anniversary in 2023.
  • In 2012, Bad 25 was a second expanded reissue of Bad that had a tie-in documentary helmed by Spike Lee.
  • Averted with Dangerous; a 25th anniversary reissue was announced for 2016, to feature new songs, demos and remixes, but never materialized.
• David Bowie examples:
  • In 2002, the 35th anniversary of his debut album marked the release of Greatest Hits Album Best of Bowie — even if it only had songs starting with the second album, namely the Title Track of Space Oddity.
  • He marked his 66th birthday in 2013 with the surprise announcement of his first studio album in ten years, The Next Day, via the relaunch of his official website and the release of its first single/video, "Where Are We Now?"
  • In 2014, the 3-disc Greatest Hits Album Nothing Has Changed marked 50 years of Bowie recordings, featuring the new single "Sue (Or in a Season of Crime)" to bookend his first single, 1964's "Liza Jane". This is the first and only Bowie-curated compilation to include pre-Space Oddity songs.
  • In 2016, he marked his 69th birthday with the release of ★, designed as his Swan Song following his diagnosis with liver cancer, which would kill him just two days after the album's release.
• Anniversaries of Jean-Michel Jarre's Oxygène:
  • He belatedly celebrated the 10th anniversary with an eponymous Boxed Set in 1987, collecting every album of his since Oxygène (barring Music for Supermarkets, which remains confined to a sole, auctioned-off LP copy and home tapings from a radio broadcast).
  • He celebrated the 20th anniversary by releasing the back-to-the-roots-but-still-kind-of-90s sequel album Oxygène 7-13 — about half a year late, but still. When asked back then which Oxygène is his favorite, he jokingly replied it's the third one he's going to release in another 20 years. After the new album came Jarre's first indoors tour, the Oxygène Arena Tour, during which neither of the two Oxygènes were played in full.
  • Jarre did release Oxygène 3 precisely 40 years after the release of Oxygène.
  • He also celebrated the 30th anniversary. First he largely re-recorded the original Oxygène at his studio. Then he took his three live co-keyboardists and his entire rig of about five dozen mostly vintage synths to the Belgian Alfacam Studios to re-record Oxygène yet again, this time not overdubbed but played live by these four musicians while being filmed and expanded by three Variations. The outcome was titled Oxygène – Live in Your Living Room. Next, he took this concept onto a live stage at Théâtre Marigny where he played ten concerts in a row. And then an actual tour followed with still the same concept. By then, Jarre was one and a half years late, and the last concerts of that tour were more than two years late, but the French consider being in time bad manners. All in all, Jarre celebrated the 30th anniversary of Oxygène by remaking the entire album 47 times over.
• Some more Jean-Michel Jarre anniversary celebrations:
  • Rendez-vous Houston celebrated both the state of Texas' and the city of Houston's 150th anniversary and the 25th anniversary of NASA. Jarre even joked about returning another 150 years later.
  • The mini-gig Destination Trocadéro honored the Eiffel Tower's 100th birthday.
  • Paris La Défense, breaking Jarre's Rendez-vous Houston audience record, was exactly one year late for celebrating the 200th anniversary of the French Revolution and the 10th anniversary of Jarre's already record-breaking debut concert. That said, he had plans for a big Paris concert in 1989 in order to also celebrate the Eiffel Tower's birthday, but these had to be nixed. Instead, he played the small Destination Trocadéro and delayed the big show by one year.
  • At Jarre's Europe in Concert gig in Brussels, the fans celebrated his 45th birthday. A concert bootleg actually contains "Happy Birthday" sung by the audience.
  • Oxygen In Moscow, breaking Jarre's Paris La Défense audience record, was part of the city of Moscow's 850th anniversary celebrations.
• GaMetal's fiftieth song was a medley of remade previous songs. The hundredth GaMetal song was also a medley, this time of gaming's most iconic tunes.
• Garbage's 20th anniversary in 2015 had both a special edition of their debut and a tour where they performed said album on its entirety, including the B-sides.
• Nightwish celebrated its 20th anniversary a little belatedly in 2018 with the release of Decades, a compilation of remastered favorite tracks from 2015's "The Greatest Show on Earth" all the way back to their original demo "Nightwish" in 1996.
• MAP OF THE SOUL: 7 was released on BTS' 7th year as a group. Due to 7 also being their number of members (as well as the existence of the Rule of Seven and Lucky Seven tropes), this album is a reflection and celebration of BTS' journey, with many Call Backs as well as lyrics ruminating on the nature of fame and their growth as artists and as people.
• On February 10, 2021, Rebecca Black released a poppier, remixed version of "Friday" exactly ten years after its original release date.
• On October 29, 2021, to mark the 30th anniversary of Ozzy Osbourne's "Hellraiser" single, a special mashup version was produced, combining Ozzy's vocals with those by Motörhead frontman and co-writer Lemmy Kilmister (who'd passed away in 2015) off Motorhead's own rendition into a duet.
• Sabaton celebrated their twentieth anniversary, and Wacken Open Air's thirtieth anniversary, with a special two-hour reunion set in 2019 with four of their former members (three of whom had left to form Civil War in 2012) rejoining the band on the festival's second main stage.

Pinball

• Batman '66 was marketed as both a celebration of the original TV series' 50th anniversary and Stern Pinball's 30th year in business.
• Elvira's House of Horrors: The 40th Anniversary Edition, revealed in late 2021, was made to commemorate the time since Elviras Movie Macabre premiered in 1981.
• The flyer for Godzilla (Sega) touts it as a celebration of "45 Years of Godzilla History" (though it was released in 1998, at which point the original film was only 44 years old).
• The cornerstone models of James Bond 007 (Stern) were released in 2022, 60 years after Dr. No (the first James Bond movie). The 60th Anniversary Limited Edition, released a few months later in early 2023, commemorates the occasion by featuring elements from every film in the series.

Pro Wrestling

• The "Fifth Year Festival'' Ring of Honor held in its place of its usual anniversary show was a six day tour starting in NYC, New York and ending in Liverpool.
• WWE Raw: Celebrated its milestone anniversaries — 10th (2003), 17th (2010), 20th (2013), 25th (2018), and 30th (2023); as well as its 900th, 1,000th, 1,100th and 1,200th episodes. Usually, these shows involved special title matches and other special main events with unique stipulations and — more notably — the return of top superstars from the past.
• To celebrate the 25th anniversary of Mike Quackenbush's in-ring debut, he has released matches that were personally special to him to CHIKARA's YouTube channel that had never been released in that medium before.

Puppet Shows

• Sesame Street:
  • The series had anniversary specials during years 10, 20, 25, 30, and 35.
  • The 40th anniversary had to settle on-air with "40" (the highest number in the show's curriculum) ^note based on counting by ones sponsoring the season premiere. That season was also loaded with Continuity Nod Easter Eggs and cameos (both on-set and in photographs) of staff members and retired Muppet characters (including Kermit the Frog, who was retired from Sesame Street since the Disney buyout of The Muppets, and X Ray, a generic Muppet specifically created for the Scrubs episode "My ABC's", which was an Imagine Spot-induced Fake Crossover with Sesame Street). Season 40 also premiered 40 years to the day that Sesame premiered on November 10, 1969.
  • In 1977, the 1000th episode was commemorated with a primetime special on PBS entitled Sesame Street At Night?^note Not a typo - the title is based on a critic's remark that the show was "too good for kids", hosted by Gene Shalit.
  • For the show's 50th anniversary in 2019, Sesame Workshop went all out with the festivities, including new merchandise, reissues of older Little Golden Book tie-in titles, a social media campaign called #ThisIsMyStreet, a ten-city road trip, and two anniversary specials. The DVD compilation 50 Years and Counting included many older segments (and characters) plus nine fan favorite and/or landmark "street stories" in their entirety. In addition, the show's creators received a Kennedy Center Honor for the show's cultural and educational impact that December.
• Barney & Friends had Old King Cole come over for a visit in episode 100. Barney is reunited with some alumni to celebrate 10 years of the Barney franchise, and gets a memory book after 20 years.
• Played straight with the 100th episode of Blue's Clues, where Joe and Blue did not search for clues, instead choosing to do a Clip Show where the entire cast reminisced about their past adventures. Steve Burns even made an unexpected guest appearance visiting from "college" to disprove the countless rumors going around at the time as to why he left the show.
• The Muppets: A Celebration of 30 Years, marking 30 years since Jim Henson's first TV puppet show Sam and Friends, was an hour-long special set at a testimonial dinner for Kermit (who had first appeared way back then), a Massive Multiplayer Crossover in the style of the following year's A Muppet Family Christmas.
• The Noddy Shop was brought over to the United Kingdom to celebrate the 50th anniversary of the Noddy franchise.
• Subverted in The Book of Pooh when the storybook the series is set in reaches its 100th page. Pooh and the rest want to celebrate that, but by the time they were ready, the book has advanced to page 110.

Radio

• The 30th anniversary episode of I'm Sorry I Haven't a Clue came from the Playhouse Theatre (where the first show was recorded) and included an introduction by the original producer, David Hatch, and the Mornington Crescent Championships, with commentary by Raymond Baxter.
• The 100th episode of The Infinite Monkey Cage was an hour long special with the return of many former guests (they usually only have two). There was also a 40 minute video version on iPlayer, which included the return of the Robin, Brian and Eric Idle puppets from the 2014 video trailers.
• The 100th episode of Were You Raised by Wolves? is a highlight of great stories and segments from the previous 99 episodes.

Sports

• Major League Baseball celebrated the game's centennial in 1939, by having all sixteen teams wear a commemorative patch, one of the first such anniversary patches in sports. This was all based on the widespread lie that Abner Doubleday had invented the game in Cooperstown, NY in 1839. The National Baseball Hall of Fame and Museum had been established in Cooperstown in 1936.
  • MLB would celebrate a more legitimate anniversary in 1969, marking the centennial anniversary of the first acknowledged all-professional baseball team, the Cincinnati Red Stockings (a separate franchise more closely linked with the Atlanta Braves than the modern Reds).^note To get into specifics, the founder of the team along with three other players organized a team named the Boston Red Stockings in 1871, as part of newly founded National Association of Base Ball Players. That team eventually moved to the National League and became known as the Boston Braves; the Braves moved the Milwaukee in 1953, then moved to Atlanta in 1966. MLB celebrated with a new patch featuring a brand-new logo that would be adapted to represent MLB going forward. They also celebrated the 125th anniversary in 1994, but the season-ending players' strike caused that to end on a sour note.
  • The National League celebrated its 100th anniversary in 1976 by having its participants in the All-Star Game wear special NL pillbox-style hats. In addition, several NL teams wore their own pillbox hats as alternate caps during the season, although the Pittsburgh Pirates opted to go with the pillbox full-time for several seasons.
  • MLB celebrated the 50th anniversary of Jackie Robinson's debut with the Brooklyn Dodgers, breaking baseball's color barrier, by retiring his uniform number, 42, across all of baseball on April 15, 1997. Players wearing the number at the time were permitted to continue to wear it until the end of their careers. For the 60th anniversary in 2007 onward, MLB has held Jackie Robinson Day every year on April 15th, where every player takes the field wearing number 42 for the day (though the event does get pushed back on account of rain for some teams).
  • MLB celebrated the 75th anniversary of Lou Gehrig's farewell speech on July 4, 2014 by raising money for ALS research from sales of the patch worn by every team that day.
• The National Football League celebrated its 50th season in 1969. Every NFL team wore a modified NFL logo patch that featured the number 50 in place of the football and stars on the blue upper portion of the shield. The American Football League also celebrated its tenth and final season with an anniversary patch of their own, as the two leagues would complete their merger in 1970.
  • The NFL went on to celebrate its 75th season in 1994; in addition to a league-wide anniversary patch, most teams wore throwback uniforms for at least one game. (Cleveland and Indianapolis opted not to wear throwbacks as their current uniforms were their most iconic, while Tampa Bay didn't have any older design to throw back to at the time).
  • The NFL celebrated the 50th anniversary of the AFL in 2009 (the 50th season of the eight founding AFL franchises), and those teams wore AFL-era throwbacks. This caused an interesting situation with the New York Jets and Tennessee Titans; the Jets threw back to their earliest seasons as the New York Titans, facing the Titans who threw back to their days as the Houston Oilers.
  • The NFL celebrated the 50th Super Bowl with gold NFL logos and the 50-yard markers on every field^note except Oakland, because of conflicts with Major League Baseball being painted in gold. They also referred to Super Bowl 50 with Arabic numbers instead of Roman, as "L" (the Roman numeral for 50) is often used to represent losers, and wouldn't look good for a logo for the sport's biggest championship.
  • The NFL celebrated its 100th season in 2019, kicking off the season with the Chicago Bears (the only team to play in every season of league play) hosting the Green Bay Packers in the league's longest-running rivalry. Additionally, the league scheduled a weekly game honoring landmark moments in NFL history (detailed here). The celebrations didn't end with the 2019 season; for the league's actual 100th anniversary in 2020, the Pro Football Hall of Fame announced a 15-member "Centennial Slate" of Hall inductees that will enter the Hall in 2020 alongside the normal four- to eight-member induction class.
• National Hockey League
  • The League celebrated its 75th season in 1991-92 with both a league-wide patch and by having the Original Six teams^note Boston Bruins, Chicago Blackhawks, Detroit Red Wings, Montreal Canadiens, New York Rangers, Toronto Maple Leafs wear throwback uniform designs for select games throughout the season. In addition, the league switched its home and road uniform colors after the All-Star Game, having teams wear their white uniforms on the road, reverting to white at home in the Stanley Cup Playoffs. The five surviving expansion teams from 1967^note Los Angeles Kings, Minnesota North Stars, Philadelphia Flyers, Pittsburgh Penguins, and St. Louis Blues; the California Golden Seals/Cleveland Barons franchise had folded in 1978 when the organization was merged with the North Stars also celebrated their 25th seasons. This was followed up with the celebration of the Stanley Cup Centennial in the 1992-93 season. Once again, every team had an anniversary patch, and a modified championship patch for the Stanley Cup Finals that celebrated the centennial as well.
  • The NHL celebrated its 100th anniversary in 2017 - from January 1st to December 31st, straddling two seasons - by having teams wear the centennial anniversary patch on their right sleeves. This included a pair of outdoor games specifically to celebrate the anniversary - the Centennial Classic on January 1st, and the NHL 100 Classic on December 16th.
• Historically, if teams celebrated anniversaries, they only focused on the major ones, such as 25th, 50th, 75th, or 100th. However, in modern times, it has become increasingly common for teams to celebrate their 10th, and even 5th, anniversaries with patches and the like.
  • The Montreal Canadiens held one of the more notable anniversary celebrations for their centennial. They began their celebration in the 2008-09 season and carried it into the start of the following season, up to their actual 100th anniversary on December 4th, 2009. Of note is that they had two logos for the anniversary - one that simply featured the number 100 and the years 1909 and 2009, and another that read "100 Seasons/Saisons". The only problem with that is that they wore the 100 Seasons patch only during the 2008-09 season - which, thanks to the 2004-05 season being cancelled in its entirety due to a labor dispute, was the Canadiens' 99th season of play. However, the case could be made that it was still their 100th season of business operations.
  • The 2004-05 lockout also screwed up several team anniversary celebrations. Some teams have continued to celebrate their original anniversaries after the lockout, while others have pushed them back a season. For example, the Ottawa Senators celebrated their 25th anniversary during the 2016-17 season, while the Tampa Bay Lightning celebrated their 25th during the 2017-18 season, even though both teams were founded the same year. Similarly, the Stars celebrated the 20th anniversary of their relocation to Dallas in 1993 during the 2012-13 season, while the Anaheim Ducks and Florida Panthers, both founded in 1993, celebrated their 20th anniversaries the following season. Making matters worse are the New York Rangers, who celebrated their 85th(!) anniversary during the 2010-11 season (what would've been their 85th season of play if not for the lockout), but then held their 90th anniversary six seasons later, during the 2016-17 season.
• The National Basketball Association celebrated its 25th anniversary in 1970-71 and its 35th anniversary in 1980-81, but celebrated its 50th anniversary in 1996-97, the league's 51st season^note though its first three seasons were as the Basketball Association of America, before merging with the National Basketball League in 1949. For the 50th, the NBA logo on the uniforms was gold, and several teams wore throwback uniforms for select games.
• The most confusing slate of team anniversaries possibly belongs to MLB's Houston Astros. Their first season was in 1962 as the Houston Colt .45s, but legal action from Colt's Manufacturing Company forced them to change their name to the Astros in 1965. The Astros had celebrated their 25th season in 1986, their 35th season in 1996, their 40th season in 2001, and their 45th season in 2006. But then they decided to celebrate the 45th anniversary of becoming the Astros in 2010. This was followed by their 50th anniversary celebration in 2012 (their 51st season), and then the 50th anniversary of becoming the Astros in 2015. Though Astros' rename anniversaries also double as the anniversary of their previous home, the Astrodome as seen on the 50th Astros patch.
• In 2016, the South American confederation of Association Football (CONMEBOL) celebrated their 100 years of existence with the Copa América Centenario (Centennial America Cup), celebrated in the United States and played by all South American national teams as well as the best teams from the Central American, North American and Caribbean side. It was won by Chile.
• Formula One celebrated it's 70th annivesary in 2020 with a Title Sequence filled with highlights from the sport's history, and (primarly due to the COVID-19 pandemic), held a one-off race at Silverstone called the 70th Anniversary Grand Prix, a fitting name given that the race track hosted the first ever F1 World Championship race in 1950.

Tabletop Games

• The World of Darkness: For the 20th anniversaries of Vampire: The Masquerade, Werewolf: The Apocalypse, and Mage: The Ascension, White Wolf released 20th anniversary editions of the games, compiling the splats and powers released over each game's history into a single corebook, though W20 and M20, thanks to Schedule Slip, came out after their anniversaries.
• Magic: The Gathering:
  • The 20th anniversary saw the release of From the Vault: Twenty, a From the Vault collector's set with 20 cards that had featured in tournament-winning decks (one for each year).
  • For the 25th anniversary, Wizards released both Masters 25, a reprint set with at least one card from every expansion to date; and the Dominaria expansion, the first return to the game's original setting in over ten years.
  • The 30th anniversary included a year-long (four-expansion) storyline that started on Dominaria and ended with an invasion of the entire Magic multiverse, as well as a Magic 30 convention. It also involved the release of possibly the single most controversial product in the game's history: a 30th anniversary booster box with four packs containing (tournament-illegal) reprints of the game's most famous cards, for $999.
• Yu-Gi-Oh!:
  • After 10,000 cards were created in Japan, the card Ten Thousand Dragon was released.
  • The 25th anniversary of the franchise was commemorated by introducing the Quarter Century Secret Rare rarity to booster sets released in 2023. The first six booster packs in the game's TCG print, as well as the first Legendary Collection box, were also re-released for the TCG with the addition of a 25th Anniversary seal on the packaging and the new card rarity. The cards Dragon of Pride and Soul and Magicians of Bonds and Unity, whose stats and effects all revolve around 25, were announced.
  • Also for the 25th anniversary, a video called Yu-Gi-Oh! Card Game the Chronicles was released, a series of clips set in the world of the cards.

Theatre

• A Chorus Line:
  • When the original production surpassed the record for longest-running Broadway musical on September 29, 1983, a whopping 332 dancers from past, national, and international casts, including the iconic original cast, performed the show's finale "One".
  • For the show's 40th anniversary in 2015, the original cast of Hamilton, then Off Broadway at the Public Theater where A Chorus Line premiered, struck the iconic pose and performed "What I Did For Love" with the original cast.
• Cirque du Soleil milestone celebrations:
  • Alegría launched in 1994 as the company's 10th anniversary show; the year also saw the retrospective documentary A Baroque Odyssey.
  • The 20th anniversary of the company was marked with, among other things, the retrospective book 20 Years Under the Sun and the Midnight Sun concert in Montreal. The latter doubled as a 25th anniversary marker for the city's international jazz festival, which the concert was held at.
  • The 25th anniversary ("The Dream Continues") included a stilt-walking event centered on Las Vegas, a two-disc Greatest Hits Album featuring songs from almost every show produced up to that point, and a book on the company's costumes over the years.
  • The 30th anniversary was marked with the two-plus week run of a choral concert of Cirque music performed in Montreal's Saint-Jean-Baptiste Church and the photo book Backstage Cirque du Soleil.
  • Individual shows often mark their 1st, 5th, 10th, etc. anniversaries with a curtain call celebration during the performances that fall on the date in question, and perhaps a small gift for audience members that night (a 15th anniversary pin at "O", for instance). In Las Vegas, ads that year will include a special logo noting the milestone. Celebrations have also been held to mark a show reaching 100, 500, 1000, 1500, etc. performances.
  • There was also a special celebration for a single performer in 2012. Longtime circus performer and Mystère principal clown Brian Dewhurst's 80th birthday fell on a performance night, so a giant surprise party (yes, Surprise Party) was arranged for him, which played out over and after the two performances.
• The 20th anniversary of the London production of Andrew Lloyd Webber's The Phantom of the Opera was marked with the BBC documentary special Behind the Mask. The 25th anniversary was marked with a mega-staging of the entire show at Royal Albert Hall (140 cast members as opposed to the usual 40, etc.), followed by a "grand finale" featuring appearances by most of the original London cast and a performance by Sarah Brightman (the original Christine); this was filmed and released on video.
• The tenth anniversary of Les Misérables was celebrated with a concert at the Royal Albert Hall, and the 25th with a staging in the O2 arena, with The Reveal that they are making a movie musical adaptation.
• Miss Saigon received a West End revival in 2014 to mark its 25th anniversary, and even got a new song for the occasion ("Maybe"). There was also a gala performance featuring both original and revival cast members, and tickets were dialed back to 1989 prices for that particular show.
• The Wiz had its 40th anniversary honored in 2015 with a live performance on NBC, the digital release of a long-shelved movie tie-in soundtrack titled Diana Ross Sings Songs From The Wiz, and the announcement of a Broadway revival for the following year, though that never actually materialized.

Theme Parks

• Disney Theme Parks have interesting anniversary promotions for whenever a park reaches the 10th, 25th, etc. anniversary of its opening day, usually debuting new attractions in the parks, new/updated shows and parades, and usually a large gimmick. Examples:
  • For its 25th year, Disney World's Cinderella Castle was transformed into a gigantic pink cake.
  • Mickey Mouse's 60th birthday was acknowledged at Florida's Magic Kingdom with a whole themed "land", Mickey's Birthdayland, in 1988. The park kept it and tweaked its theme over the years — first it became Mickey's Starland, then Mickey's Toontown Fair — until it was torn down in The New '10s to make way for the Fantasyland expansion.
  • A notable example is the "100 Years of Magic Celebration" (2001-2003) which celebrated simultaneously Walt Disney's 100th Birthday and Walt Disney World's 40th Anniversary. The Walt Disney Company decided to honor Walt's Birthday at almost every single Disney Park (notably Tokyo Disneyland and Walt Disney World) by gaining special offerings. A year prior, Tokyo Disneyland debuted a new daytime parade called "Disney on Parade - 100 Years of Magic" which honored Disney's early days and up to the Renaissance Era. Walt Disney World Resort was the centerpiece of the celebration with Disney Hollywood Studios (formerly "MGM Studios") gaining a giant Sorcerer Mickey Hat which sold pins. Epcot renamed "Tapestry of Nations" to "Tapestry of Dreams" to make it relevant to Walt Disney and Dreams, and the Magic Kingdom created the "Share A Dream Come True Parade" which celebrated Walt Disney's accomplishments on film and animation.
  • The 50th Anniversary celebration of the original Disneyland in California was particularly elaborate. The celebration included covering Sleeping Beauty Castle with tons of gold decorations, painting at least one vehicle on every single still operating attraction that originally opened in 1955 gold, fixing up various attractions that had noticeably deteriorated during the Paul Pressler era, opening Buzz Lightyear's Astro Blasters, reopening Space Mountain after a 2-year long overhaul, announcing the construction of the Finding Nemo Submarine Voyage, and, as usual for a Disney anniversary celebration, hosting a new parade and fireworks show (the latter still runs to this day on a seasonal basis). If that wasn't enough, various celebrations were also held at every Disney resort around the world at the time with new attractions and shows being added to the parks in Florida, Tokyo and Paris and even including the opening of the then newest park, Hong Kong Disneyland, as part of the celebration.
  • Compared to Disneyland and Walt Disney World, Tokyo Disneyland really goes all out on their anniversaries. Tokyo Disneyland's 30th Anniversary was known as "The Happiness Year" which had their castle decorated in colorful Mickey balloons (which gained a special night show), a parade sharing the anniversary's name, and a special morning show at Tokyo Disneysea called "Happiness Greeting On The Sea".
  • Planned but unfortunately averted for the 65th anniversary of Disneyland in 2020 due to the Coronavirus Pandemic shutting down the entire complex in March; the park didn't reopen until April 2021, long after the relevant date passed.
  • When Walt Disney World turned 50 on October 1, 2021, it was immediately marked with the opening of Remy's Ratatouille Adventure at Epcot after it was delayed for over a year due to the COVID-19 Pandemic, which delayed most of the other planned projects for the celebration until well after it ended. There were also new fireworks and/or light shows at all four parks. Guardians of the Galaxy Cosmic Rewind at Epcot opened for Summer 2022. Some places outside the parks also celebrated the 50th anniversary of Disney World, including McDonald's (with a special Happy Meal promotion), ABC (with a 20/20 special airing on the day of the anniversary) and Sirius XM's Disney Hits radio station (with its' Extra Magic Hours block playing songs from Disney World for the week of October 4, 2021, rather than on the actual week of the anniversary).
  • The Main Street Electrical Parade received some updates during its 50th anniversary in 2022, such as replacing the "To Honor America" float with an "it's a small world"-inspired tableau of characters ranging from The Blue Fairy (who led every performance from 1972-2009) to Mirabel and Antonio Madrigal.
  • In 2023, Disneyland Resort celebrated the 100th anniversary of The Walt Disney Company by unveiling an updated Toontown, containing an expanded clone of Mickey & Minnie's Runaway Railway. It also premiered new nighttime shows for each park: At Disneyland, Wondrous Journeys combines emotionally-resonant elements from the Disney Animated Canon's first 62 movies, including the Blue Fairy and Baymax flying over a temporarily-redecorated Sleeping Beauty Castle. At California Adventure, World of Color: One highlights inspirational moments from various Disney-owned works, both animated and live-action.
• SeaWorld celebrated the 50th anniversary of its brand in 2014 across all three parks, by doing things such as bringing in new street entertainment.
• Almost always averted with the Universal Studios parks. There were plans to do a park-wide celebration of Islands of Adventure's 10th anniversary in 2009, but it was cut due to there being virtually no budget for it, as at the time most of it was going into the construction of The Wizarding World of Harry Potter. There was no 20th Anniversary celebration of Universal Studios Florida either, presumably for the same reason. In 2015, this was finally played straight when Universal Orlando honored their 25th anniversary, though even then the milestone nods were mostly limited to some special theming around the park and a new temporary logo. The 30th anniversary in 2020 went virtually unacknowledged, in part due to the Coronavirus Pandemic shutting the complex down for several months.
• Done several times with Universal's Halloween Horror Nights, first for their "Sweet 16" in 2006, then for their 20th anniversary in 2010, and once more for their 25th anniversary in 2015. A 30th season bash was derailed by, again, the Coronavirus Pandemic; the event was cancelled for 2020 in favor of two reduced-capacity haunted houses plus a third house on the final weekend of the usual season.

Toys

• Transformers has had quite a few of these:
  • The UK version of The Transformers (Marvel), due to a quirk of publishing, ended up with over four times as many issues as the US comic. Issues 100 (1987), 200 (1989), and 300 (1990) all featured wraparound covers and double-length stories.
    • Issue 50 of the US comic featured Starscream wiping out a large chunk of the cast before biting the dust himself. This was done to pare down the cast, though many of them (including Starscream himself) would be brought back (most, but not all, being due to new toys, of course).
    • Issue 75 saw the big battle against Unicron. Unsurprisingly, there were many more casualties.
  • 20th Anniversary (2004):
    • Toys: A huge transformable figure of Optimus Prime, complete with his trademark gun, laser axe, a miniature Megatron in gun mode, and of course, the Matrix of Leadership.
    • Transformers: Energon had the episode "Distribution" being the 500th episode of Transformers to be shown on Japanese TV. It was a weird, pointless episode that spoofed Professional Wrestling.
  • Beast Wars 10th Anniversary (2006): a rerelease of several figures along with two new figures of Optimus Primal and Megatron. All the toys had pieces which could be used to build Trans-Mutate.
  • Transformers: Energon was supposed to be the huge 20th anniversary series. Results, though, were....mixed, to be polite. Animation errors, inconsistent naming, character de-evolution, an extreme focus on selling toys, fluctuating art and animation, bad editing and awful dubbing were all common for Energon. The only remaining awesome factor of Energon from its Japanese counterpart (Super Link) was the music...and not even the toyline was safe, because that also carried over the flaws of the Armada toyline.
  • 25th Anniversary (2009):
    • Toys: The original Optimus Prime toy was rereleased with the inclusion of a DVD of the first three episodes of the original series and a copy of the first issue of The Transformers (Marvel). Also, new toys were produced based on characters from throughout the franchise, from G1 to Transformers: Armada.
    • The airing of Transformers: Animated (2007-2009) coincided with this period. It celebrated by paying homage to every single Transformers incarnation previously made, even the obscure ones that were barely even released in Japan and not at all outside. Granted, many of those nods and references were All There in the Manual, but that said, the manuals (that is, the Allspark Almanac, volumes 1 and 2) are extensive and full of Mythology Gags.
  • 30th Anniversary (2014): Both Hasbro and TakaraTomy are featuring 30th Anniversary lines (Hasbro dubbing theirs "Thrilling 30", which began with releases in fall 2013).
    • Transformers: Age of Extinction was released, marking the beginning of an expected second film trilogy.
    • Transformers: Robots in Disguise (2015), the sequel series to Transformers: Prime, was announced, though it wouldn't debut until 2015 (the name was previously used for the English dub of Car Robots in 2001, not to mention one of IDW's ongoing comic books).
    • The IDW series's mega-event Dark Cybertron and the follow-up in the ongoing series, Dawn of the Autobots, which includes the Windblade miniseries. Windblade herself was the culmination of a fan poll for the creation of a new character.
    • Toys: the Generations toyline features characters from non-G1 continuities (such as Rattrap, Waspinator, Tankor, Armada Starscream, and Fall of Cybertron Skywarp) who are represented in the IDW continuity (with their Hasbro figures including reprints of Dark Cybertron chapters). Hasbro debuted Masterpiece Soundwave to open the Thrilling 30 toyline, along with Acid Storm (an MP-11 Starscream redeco), and is reissuing MP-10 Optimus Prime (in a special "Year of the Horse" deco) and Grimlock, and debuting Prowl. Takara issued MP Soundblaster with Ratbat, and will be issuing MP versions of Wheeljack, Bumblebee (with Spike in his exosuit), Ultra Magnus, and Star Saber.
  • The third part of the War for Cybertron Trilogy, Kingdom (2021), commemorates the 25th Anniversary of Beast Wars and as such features updated figures for almost the entire Beast Wars Season 1 cast, some of which had not received new figures in years. The line also commemorates the 35th Anniversary of The Transformers: The Movie and features figures of Rodimus Prime, Galvatron, and Cyclonus. The rest of the movie cast also got their own dedicated subline in the Transformers Studio Series line, Studio Series 86.
  • 40th Anniversary (2024):
    • Toys: The celebration for this milestone began two years early in 2022 with the three-year Legacy toyline which features characters from across the Transformers multiverse in the vein of the previous War for Cybertron Trilogy. The first year had Star Saber and Victory Leo^note HasLab Project and G1-accurate versions of the Stunticons, Elita-One, and Jhiaxus, Inferno and Tarantulas to complete the Beast Wars Season 1 Predacons as well as Predacon Megatron in his Transmetal II dragon body, RID 2001 Scourge, Armada Starscream and Cybertron Override and Metroplex, and Prime Bulkhead, Arcee, and Knock Out. The second year, Legacy: Evolution, had the Nemesis, Devcon, Deathsaurus^note HasLab Project, and Tarn, Lio Convoy^note Under a Dub Name Change to Leo Prime, Armada Optimus Prime, Hot Shot, and Megatron (to commemorate the 20th anniversary of Armada), Animated Prowl, Prime Skyquake and Dreadwing, RID 2015 Strongarm, and Cyberverse Shadow Striker. The third year, Legacy: United, had Tigerhawk, Tasmania Kid, and Magmatron, Armada Tidal Wave, Animated Optimus Prime and Bumblebee, Prime Thundertron, Rescue Bots Chase, and Cyberverse Windblade.
    • Though a tie-in cartoon to Legacy that was pitched to Netflix as a Distant Sequel to the War for Cybertron Trilogy was turned down, a different cartoon, Transformers Earthspark, released on Paramount+.
    • The seventh film in the Transformers Film Series and the second in the rebooted Travis Knight continuity after Bumblebee, Transformers: Rise of the Beasts was released on June 2023. On a toy-related note, the 100th figure in the Transformers Studio Series line is Bumblebee's Offroad Camaro form from the movie (a nod to the first figure in the line being his 1977 Camaro form from the first movie).
• Nendoroids are adorable, pseudo-bubblehead figurines primarily aimed at otaku. With that in mind, the 100th release in the line is a character who falls outside of that demographic: Mickey Mouse, who is quite jarring when put next to franchises such as Touhou Project ^note (no, Nazrin doesn't count) or Vocaloid.
• American Girl has done several.
  • For the 25th anniversary in 2011, the company released special-edition mini dolls of all the the characters in holiday or winter wear; this also included the launch of new characters Marie-Grace and Cécile.
  • Caroline, the War of 1812 character, was released on the 200th anniversary of the war in 2012.
  • The 30th Anniversary in 2016 had eight of the then-active BeForever characters released as mini-dolls in unique outfits from their collection; their stands posed them in a position similar to the walking pose on the first-edition books. (Kaya, who had a very limited outfit selection, was given the same dress she had in 2011: her special deeskin dress.)
  • During the 35th anniversary in 2021, the company rereleased the first six Historical Characters in "classic" (original) versions of their meet outfits, many of which had been retired with BeForever. These sets also included their accessories, boxes similar to the first edition ones (only now with open windows) and first edition reprints of their meet books.
  • In celebration of Kit's 100th birthday in 2023, she was rereleased in the Classic version of her meet outfit with accessories and the first edition of her meet book, similar to the 35th Anniversary dolls. This also includes rereleased versions of selected outfits and items from her collection.
• BIONICLE got a line of six small sets called the Stars, a collection of remakes of characters from across the series' decade of existence. They also happened to be the last sets before the line got the can. They tend to be perceived as a rather weak way to both celebrate a milestone and end the line.
• Barbie:
  • The original doll's 50th anniversary brought the My Favorite Barbie line of toys. Each set contains a reproduction of a famous Barbie doll, an extra outfit from the same era, and a retro pamphlet of other Barbie clothes and accessories sold at the time.
  • Barbie: Life in the Dreamhouse celebrated the 50th anniversary of Barbie's old friend Midge by adding her as a new major character.
• LEGO:
  • The 10th anniversary of the infamous "Modular Buildings" line was celebrated with the 12th entry to the series, "Assembly Square", a behemoth of a model with subtle references to the previous modulars.
  • The 90th anniversary saw the release of a few special commemorative sets. One set contained several mini builds representing the various Lego themes released over the years, most notably one representing BIONICLE which fans had thought Lego had abandoned since 2016. Other sets included Updated Re-releases of the Lion Knights' Castle and the Galaxy Explorer spaceship.
• My Little Pony:
  • The 20th anniversary of the franchise in 2006 rereleased reproductions of the first six ponies in sets of three.
  • Starting with the 35th Anniversary in 2018, the first six were released again and followed by other ponies released after them. Unlike the 20th anniversary, these were packaged to resemble their original release (though in boxes rather than on blister cards), complete with combs, tail ribbons, and stickers. One of the playsets, the Pretty Parlor, was also released, and the first six were followed up with the Unicorns and Pegasi collection (which included the first pegasi and unicorns; the rerelease was scented) and Rainbow Collection (which included the first multicolored rainbow ponies). More Generation One ponies continue to come out, but without the anniversary markers.
  • The 40th anniversary in 2023 again released the first six, but also include a line of plush ponies that are sold only on Amazon and a release of then never-before-produced Celestial Ponies, which became popular through the fandom.
• Squishmallows: To commemorate the sale of over 100 million Squishmallows, two versions of Hans the Hedgehog wearing a hat and bow tie were made available to preorder. One version has gold trim on his accessories and ears, while the other is made entirely of golden fabric.
• The 20th anniversary of the Tamagotchi digital pet toys was celebrated through the release of a short film based on the series, titled Eiga Tamagotchi: Himitsu no Otodoke Dai Sakusen!. The short was screened with the movie based on Kamisama Minarai: Himitsu no Cocotama, which was released in theaters a few months after Tamagotchi's 20th anniversary (the film and short were released in April 2017; the actual anniversary was in November 2016).

Web Animation

• Homestar Runner:
  • Strong Bad tried (and failed) to answer 50 emails in a row for his 50th Strong Bad Email, presented his 100th email (a flashback of how he met Homestar) in widescreeeeen!, and traveled to meet alternate universe versions of himself for #150. For #200, there was a big build-up only for the resulting email to be addressed to Homestar rather than Strong Bad- it's then revealed that Homestar has had his own email show all along, which Strong Bad tries to ruin.
  • Homestar Runner started as a children's book made by the creators in 1996, "The Homestar Runner Enters the Strongest Man in the World Contest". Ten years later, they did a cartoon remake of the children's book, with the characters retaining their current, more over-the-top personalities:
    Homestar Runner: Everybody loves the me! I'm a terrific athlete!
  • The tenth anniversary of Where My Hat Is At? was also celebrated with a cartoon remake, parodying the original story.
  • Also parodied in Issue 10 of Teen Girl Squad. Keep in mind that in Teen Girl Squad, everyone dies Once an Episode:
    Cheerleader: It's our tenth issue-versary! Let's do a Clip Show!
    So-And-So: Let's have a wedding!
    The Ugly One: Let's have a baby!
    What's Her Face: Let's kill someone off!
    Narrator Strong Bad: Okay! (everyone dies suddenly in bizarre ways)
  • For the 20th anniversary of The Homestar Runner Enters the Strongest Man in the World Contest, the Brothers Chaps did a Homestar cartoon based on the unfinished second Homestar book, The Homestar Runner Goes for the Gold, with the Framing Device of Strong Bad and Homestar finding the book in a box of "Old HSR Crap" and making fun of their own Early-Installment Weirdness.
  • 20 years after the Strong Bad Email that introduced Trogdor, Strong Bad shows us an old issue of Electronical Good Graphics Monthly, that included a demo of an unreleased VGA version of Peasant's Quest, which Strong Bad proceeds to play.
• Supermarioglitchy4's Super Mario 64 Bloopers
  • "SM64: Mario in real life!? (200 vid special)".
  • "Ssenmodnar 2 (100th vid)" could also count.
  • "P.O.I.S.O.N.E.D. Computer" was SMG4's 50th video, although he didn't really celebrate it and instead put a caption at the beginning saying exactly that it is his 50th video.
• This practice was thoroughly mocked by Zero Punctuation. His 100th episode opened with him celebrating the event, complete with party hats and noisemakers. So, to commemorate the event, he reviews a very special game; Call of Juarez: Bound in Blood. Which... is exactly the game he had scheduled anyway.
  It's just a number. 101 is also a number. And so is 99, and at least that one looks like someone getting bumfucked.
  • Later in the review, a sentence is abruptly interrupted by another noisemaker bursting out the side of Yahtzee's head, apropos of nothing. He just apologizes for the interruption and goes on, with what appears to be a bloodied ear.
  • Then, two episodes later, he actually does review a game he really likes: Silent Hill 2.
    And what better game to celebrate my 102nd episode?! *noisemaker*
• How It Should Have Ended has a parody of Titanic (1997), the second highest-grossing movie of all time, as the 100th video.^note The show already spoofed the #1 blockbuster, Avatar, a few years earlier.
• The 100th episode of Welcome to Night Vale brought back every single person who had ever voiced a character.
• DEATH BATTLE!: Each milestone has a massive bump in budget, animation quality, and score.
  • The 25th episode was "Goku VS Superman". This episode also acted as the finale to season 1 of the show.
  • The 50th episode was "Goku VS Superman 2".
  • The 75th episode was "Power Rangers VS Voltron".
  • The 100th episode was a rematch for "Mario VS Sonic". In addition, this episode introduces animated segments with the show's hosts Wiz and Boomstick.
  • The 125th episode was "Goro VS Machamp".
  • Season 8 as a whole is designed to celebrate the show's 10th anniversary, with particular note going to the premiere episode, "Yoda VS King Mickey", the 150th episode, "Macho Man VS Kool-Aid Man", and the finale, "Saitama VS Popeye".
• Episode 39 of Minilife TV is dedicated to the show's official 1 year anniversary. Chris and Ian celebrate by doing what they did in the very first episode; blowing up dummies.

Webcomics

• In the hundredth Twisted Toyfare Theatre strip, "Tonight, one of these characters will die!" Quoth Mego Spidey: "Hope it's me."
  • Note that the characters themselves have a huge party to commemorate the event - but Reed Richards secretly confides in Spider-Man that this isn't actually the 100th strip, technically speaking, due to some miscellaneous strips featured in Toyfare's sister magazines like Wizard and Inquest Gamer. As such, at the very end Spider-Man goes back in time to three issues ago and gives the huge cake from the party to the stars of the real 100th strip, the motley bunch of Stormtroopers.
• 8-Bit Theater never does anything special for its milestones, even for its 1000th. Although the titles do sometimes reference the number, such as "Episode 255: Maximum 8-bit Hexadecimal Value is FF. Coincidence?", "Episode 404: Comic Not Found", "Episode 666: Is Just Another Comic, Calm Down", "Episode 911: It's A Conspiracy", "Episode 912: For Real Emergencies", "Episode 913: The Last Of The 9XX Jokes", and "Episode 1000: I can't believe someone was asshole enough to make 1,000 sprite comics" followed by "Episode 1001: I can't believe someone was asshole enough to make more than 1,000 sprite comics".
• The Order of the Stick was intended to have the group meeting Xykon on the hundredth strip, but the writer messed up the timing, and had one character complaining about it ("And I was expecting something impressive for the hundredth episode.") Every other hundredth was something special, though. The two hundredth was the very long battle with Miko, the 300th revealed Xykon's massed army, the four hundredth was a kiss between two major characters, and the five hundredth was the start of Roy watching the rest of the Order. However, the 600th, 700th, and 800th comics had nothing particularly special about them, though the 600th repeats the same "I thought there'd be something special..." joke from the 100th episode, complete with a "Didn't We Use This Joke Already?" conversation. Milestones returned with the next few hundred-counts. Strip #900 showed a scene of another world beyond the rift sealed by Girard's (now destroyed) Gate. In Strip #1000, vampire Durkon declared himself to be the representative of the death goddess Hel and tipped the divine vote toward destroying the world before the Snarl escaped. Strips #1100 and #1200 were back to being nothing particularly special.
• 1/0, in addition to ending with comic #1000, dedicated comic #251 to its "1000th panel" celebration.
• MegaTokyo used its comic #1000 to show Kimiko having a critical part of the nature of the world around her revealed to her, and revealed Miho's Little Miss Badass status in strip #1024 (#1 KB). And comic 1337 is triple length, showing an Imagine Spot of Largo ammasing an army of Ph33rb0ts.
• Captain SNES: The Game Masta managed to work its 200th story comic celebration into the plot. The 500th was slightly clumsier.
• Questionable Content:
  • #666: Spontaneous metal interlude!
  • #1000 was titled "Gratuitous Nudity!" The author apologized three strips later.
  • And then there was number 1337.
• VG Cats had a flash animation for the 100th comic, and actually skipped the 200th comic with a note reading "TBA 2009". Which now reads "TBA - Never".
• Adventurers! had hundreds of comics numbered 999 so that the final chapter would be number 1000.
• Awkward Zombie has its 100th comic, in which Master Hand kills the recently returned Roy in one hit.
• Sluggy Freelance includes a piece of simple animation every year on its anniversary (usually making someone dance to the song "X Years of Nifty Darn Comics"). The tenth anniversary featured this plus a bonus comic that referenced the "spam Satan" joke from the very first strip.
• Darths & Droids celebrates every 50th strip by adding another level to the string of "What our webcomic is in this universe, since the thing we're parodying doesn't exist" strips following the 50th strip. While the actual 1,000th strip has nothing worth celebrating (it's the beginning of Luke's adventure on Dagobah), the accompanying alternate universe is based on George Lucas's other famous franchise, Indiana Jones.
• The KAMics is usually sarcastic about it's milestones, comic #500 is a good example of this.
• Every hundredth Yet Another Fantasy Gamer Comic strip is in color.
• The 200th comic of Brawl in the Family had a musical accompaniment, dedicated to all the Mooks that died at the hands of gamers everywhere.
• xkcd skipped comic number 404, so that a 404 'File not found' error appears if someone tries to access it. And for the 1000th comic, a binary joke: only 24 comics till a nice round number!^note  1024 is 10 000 000 000 in base two. The next binary milestone will be 100 000 000 000 (2048 comics), and at 4096 comics the total would be 1 000 000 000 000 in binary and 1 000 in hex.
• In honor of Platypus Comix's 10th anniversary, accessing the site during the week of February 7, 2011 brought up a page which resembled the homepage used in 2001. Through the Wayback Machine, the page even included links to old comics and articles, as well as a dated homepage for Platypus Comix's parent site, Toon Zone. Clicking, "Click here to restore status quo" brought up the usual website, decked out with a vertically-oriented banner, which featured characters from both ongoing and discontinued comics partying together. And during the 10th anniversary of Toon Zone, Peter Paltridge released an Electric Wonderland comic in which the main characters find themselves in Toon Zone's domain while pursuing a thief.
• The Adventures of Dr. McNinja: "Happy first anniversary, Dr. McNinja!" It's a Wham Strip.
• El Goonish Shive:
  • The webcomic used to celebrate each year of the comic with a filler comic featuring the whole main cast. It stopped doing this after the 6th anniversary but acknowledged the 9th with this filler which has links to previous milestone celebration comics.
  • For the 10th anniversary, it celebrated with a filler comic that mimics the setup and dialog of the very first comic but is in color, features transformations, references the anniversary and has a different ending.
• Sonic the Comic – Online! celebrated the 250th issue of the series with a mega-packed issue. The issue is the largest so-far in the series, the online fancomics or the original Sonic the Comic; it also featured more artists in one issue then any other issue. It feature various cameos from characters that haven't appeared in a long time.
• Arthur, King of Time and Space:
  • Its first year endedwith the Battle of Beldegraine and Arthur learning who Morgan is. It ended its second year with a timetravel flashforward. The third and fourth aniversaries just get mentioned in passing, and the fifth aniversary is the pre-Time Skip Wham Episode. Sixth passed without comment (except in The Rant), and seventh wasn't even mentioned there.
  • The AKOTAS characters also discuss whether they should celebate their three hundredth strip (the panel in the news section) and are shown celebrating in the five hundredth strip...because it's the aniversary of the first Peanuts strip. The two thousandth is the return from the Time Skip.
• Played straight in Square Root of Minus Garfield in 1000th Root of Minus Garfield and parodied in Party Like It's #999 (the comic immediately afterwards).
• Mountain Time celebrated its 500th episode with an extended-length comic, followed by 25 more comics which, seemingly in defiance of the series' norm, were pretty much straight-up Continuity Porn.
• Keezees celebrates every 100th episode; episode 100 revealed the main character's surname; episode 200 took the form of an MP3 (warning: it's loud) which, when downloaded, recorded onto an audio cassette and played back on a ZX Spectrum, revealed episode 200 onscreen; and episode 300 was Keezees first colour episode; the author also ran a contest at that time where one lucky reader was immortalised in Keezees trading card form.
• Played for Laughs on the 1000th page L's Empire when one of the characters tries to celebrate, only to be informed that it was technically only page 956 due to filler, title pages, and holiday specials. The actual 1000th page involved trolling the audience.
• The Walkyverse tends to have low-key acknowledgements of its various anniversaries. Often, these acknowledge the universe's history; significant changes in characters' lives are also often timed to coïncide with the anniversary
  • The ninth anniversary strip ran in Joyce and Walky!, and sees Danny and Billie move into a house together. It is a double-length full-colour strip, in the vein of It's Walky!'s Sunday strips.
  • The 10th anniversary saw the birth of Billie and Danny's first child, while also calling back to the first two Roomies! strips.
  • Shortpacked! got the 11th anniversary, which saw the core characters all move into a house together. This comic once again called back to the first two Roomies! strips, as well as various other iconic moments from Roomies! and It's Walky!
  • Shortpacked! also got the 12th anniversary, and showed what Joyce and Walky were up to in their own comic, and what Robin would have to do with it.
  • The six-year anniversary of Shortpacked itself was a double-length comic.
  • On the fourteenth anniversary, Amber accepts Mike's marriage proposal. That particular comic ran on a Saturday, which does not normally happen, but that's the day the anniversary fell.
  • The fifteenth anniversary of the universe was also the second anniversary of the beginning of Dumbing of Age, resulting in two notable comics on the same day. In Shortpacked, Amber and Mike get married, and a bunch of characters from the old webcomics reäppear. Dumbing of Age, meanwhile, did a strip which, yet again, called back to the very first Roomies comic. More significantly, David Willis began uploading every single Roomies, It's Walky, and Joyce and Walky comic, including those that were previously exclusive to subscribers or only printed in comic books, in proper reading order and upscaled; this archive can now be found here.
  • Shortpacked! itself formally ended on its 10th anniversary. There have been a few new comics since then, but the anniversary was the end of the storyline and of regular updates.

Web Original

• In Destroy the Godmodder, actions are more powerful and far more likely to succeed when they happen on milestone posts. The first post of a page milestone, or a number of posts milestone, a slight bonus is even given if someone calls their page claim. There was also a very big and interesting event involving time travel shenanigans on the one year anniversary.
• There's the general case of "1 million hits", "1 million subscribers", etc. This usually has some celebration or special comment on sites that consider those relevant.
• For their 100th episode Talk Radar put together a six hour long podcast that was half original content, half clip-show.
• The Music Video Show celebrated its 100th episode with a 1 hour, 3 part episode review of R. Kelly's "Trapped in the Closet". Each part is presented by the hosts of season one, three and four. The host of season two appears in the second part.
  • To celebrate the golden birthday of the show (4th season, making the show 4 years old), the beginning of the season dedicated a week of episodes to Fall Out Boy.
  • The show celebrated it's 200th episode with Hanson's MMMBop music video. Actually it's Michael Jackson's Thriller.
  • Episode 300 was celebrated with 10 episodes uploaded in the same day, each one had the hosts for one episode to appear in. And also, Kiara appears in the final minutes of the 10th episode.
• Channel Awesome:
  • Most of the team flew into Chicago to film the conclusion to the feud between The Nostalgia Critic and The Angry Video Game Nerd. The result was the 1 Year Anniversary Brawl that pitted the site's critics (led by the Nostalgia Critic) against the site's gamers (led by the Angry Video Game Nerd). It has to be seen for the amount of awesome to be believed.
  • Celebrating the site's anniversary with a gigantic crossover was a traditional event. The second anniversary of the website featured the six-part film Kickassia. The third one had the seven-part film Suburban Knights with more effects and callbacks to Kickassia. The fourth one was an eight-part film known as To Boldly Flee, containing more continuity and improved CGI effects. The fifth (and final) crossover was an anthology film called The Uncanny Valley, featuring five short subjects from various producers.
  • Generally, critics on CA (present and former) treat their 50th and 100th reviews as such — Kyle reviewed Melancholia, and JesuOtaku reviewed the FMA Anime, for instance.
• Atop the Fourth Wall:
  • Linkara celebrates the anniversary of his text reviews by reviewing issues of Youngblood (Image Comics), and celebrates the anniversary of his video reviews by reviewing story arcs from The Clone Saga.
  • The 100th episode had him review a Sonic the Hedgehog comic book (specifically Sonic Live!), one of his most requested comics to review.
  • For the 200th episode, he finally decided to rip into One More Day, the one comic people have been clamoring for him to tear to shreds since the beginning.
  • For the 250th, he did a really bad Tandy Computer Whiz Kids PSA/advertising comic and got into an argument with the camera for using the "Merry Christmas from Atop the Fourth Wall" banner again instead of a 250th episode one, which led the mystery editor to crudely cross out the Christmas message and substitute the desired message without removing the snow or Jingle Bells. The real effort apparently went into the editing for one of his Combine Harvester breakdowns.
  • For the 300th episode, Linkara reviewed Frank Miller's Holy Terror, which is another installment in "Miller Time". Linkara actually claimed that he hated Holy Terror more than any other comic he's reviewed and that it's the complete antithesis to everything he believes in. The episode's ending also features Linkara fighting his Mirror Universe doppelganger, using various weapons and skills from the past 300 episodes.
  • For the 400th episode, he reviewed a fan-translated copy of Marvel Super Special #7, an adaptation of Sgt. Pepper's Lonely Hearts Club Band. Given the material he was working with, it was also a Musical Episode with parodies of The Beatles throughout.
  • 2018 was an important milestone year for Linkara, for not only did he reach his 500th episode by reviewing The New 52: Futures End, but it was also the show's tenth anniversary, which he celebrated by having every single review that year be a followup to a previous review. The requisite Clone Saga review on the anniversary itself was a revisit to his first video review, "Smoke and Mirrors", which originally had the first two parts only available as text reviews.
  • For his 600th episode, Linkara chose to review Sins Past, an infamous story arc from The Amazing Spider-Man (J. Michael Straczynski). This review is framed as a randomly-selected improvision to cap off a running gag in these milestones where The Cinema Snob shows up assuming Linkara was reviewing a comic based on Caligula. This milestone opens with Linkara actually planning to review said comic, only to be forced to cancel it after being informed of behind-the-scenes drama.
  • For the 700th episode, Linkara reviewed Superman: Year One, with a Framing Device of his future self being interviewed and constantly retconning the history of his own show in order to keep it fresh for new audiences.
• The Nostalgia Critic:
  • The Critic celebrated his 100th episode by... showing a half-assed clip show featuring a scene from his Captain Planet review. But said clip show argued with him, forcing him into reviewing Battlefield Earth.
  • Subverted with his 300th episode. He (cliplessly) reviewed The Force Awakens with Brad Jones, but it was pretty low key. Mentioned because his 299th episode, Christmas with the Kranks, was a Continuity Porn Wham Episode.
  • To celebrate 10 years of doing the Nostalgia Critic, Doug Walker hosts the top 5 best NC videos as voted by his fans. Also the Critic reviews the heavily requested film: Norm of the North.
• The Nostalgia Chick: For her third-year anniversary of being on the site, Lindsay did an in-depth commentary on her first ever review, Pocahontas.
• Bennett the Sage dedicated his 100th and 200th Anime Abandon episodes to some of his most requested subjects: MD Geist (100th) and the JoJo's Bizarre Adventure: Stardust Crusaders OVA series (200th). In the case of the JoJo OVA, it was Bennett's longest review to date, clocking in at over 70 minutes.
• The Angry Video Game Nerd:
  • The Nerd himself had a special episode as his 100th. Action 52? That's his 90th episode. Nintendo World Championships? No, it wouldn't happen for another four episodes. It's about R.O.B.
  • For the 10th anniversary of the show, the AVGN is finally broken by the Desert Bus minigame on Penn and Teller's Smoke and Mirrors, only to learn his criticisms are being heard when he discovers the Castlevania II: Simon's Quest hack, Castlevania II: Simon's Quest Redaction, regaining his resolve and directly leading into Angry Video Game Nerd: The Movie.
  • Cinemassacre's 10-year anniversary video^note This considers the upload date of episode 3 and the date the channel was created, which is immediately displayed in the beginning of the video starts with the AVGN reflecting how technology has advanced the past 10 years—Played for Laughs, of course (it took him ten years to get an HDTV). He then proceeds to review several Mega Man (Classic) and Mega Man X games. Halfway through, he claims to be quitting, and suddenly he finds himself travelling through AVGN history. The Nerd and his past selves then end up reviewing the So Bad, It's Good Mega Man DOS games, Mega Man Legends and Mega Man X7.
  • The 200th episode, which was split into three parts, focuses on the Nerd reviewing the entirety of LJN's video game library, with the Framing Device showing he was given ownership and control of LJN, and he challenges himself to reproduce the library using the same resources and limitations as the company did back then, hoping he'd succeed at where they failed.
• The 100th episode of We're Alive was accompanied by a revamp of the show's website, launching a new iPhone app for downloading the podcast and new merchandise in the online store. In story the episode ended with the destruction of the safe-zone in Boulder.
• Eat Your Kimchi: The 200th video was A Day in the Life and the 100th Music Monday had an 18 minute "best of" compilation video.
• Game Grumps downplays this in The Stinger to the hundredth Sonic 2006 episode, wherein Arin briefly mentions it.
• Glove and Boots celebrated 100k subscribers by including (almost) all of them in a two-and-a-half hour video!
• Screen Junkies celebrated the 100th edition of Honest Trailers by doing a trailer of Fifty Shades of Grey.
• Oliver Harper's Retrospectives and Reviews:
  • He celebrated his 100th review by reviewing one of his favorite films, Ghostbusters (1984).
  • Did reviews of Superman: The Movie and Star Trek: The Motion Picture to celebrate their 35th Anniversaries.
• Taco-Man Plays a Video Game:
  • Taco-Man celebrated 50 episodes with the 50th Episode Craptacular, in which he tried to re-play some of the games he reviewed before.
  • The 60th episode, Zelda II: The Adventure of Link, had Taco-Man announce the number to an unfazed Princess Zelda in the middle of the video.
  • The 75th episode has Taco-Man play a game about himself, a 2006 parody of Night Trap.
• 4chan's /v/ board celebrated its 300 millionth post, which was a photo of one of the amiibo costumes in Splatoon, followed by "Splatoon is new meme", by giving it a sticky, and then publicly banning the post.^note The ban was for 14 days.
• To celebrate the third anniversary of Ask King Sombra, the author of the blog did an animation of Sombra singing "Up There" from South Park: Bigger, Longer & Uncut, with Call Backs galore.
• The 100th episode of Red vs. Blue was the final episode of "The Blood Gulch Chronicles", the 200th Episode was the final episode of season 10 and the conclusion of the Freelancer storyline.
• For their 10th anniversary, SuperMarioLogan remade their first video as a proper reenactment of Mario's "Got Milk?" commercial, but with a Twist Ending.
• The Fine Brothers' React Channel subseries "People vs. Food" celebrated its 100th episode by challenging the reactors to eat an entire, suitably decorated ice cream cake without using their hands.
• Some of Allison Pregler's series have a few examples:
  • The 50th episode of her first series Obscurus Lupa Presents was a review of Texas Chainsaw Massacre: The Next Generation. For the 100th episode, she reviewed her favorite film Evil Dead 2.
  • For Baywatching, she asked fans what they wanted for the 100th episode, which ended up being a video of trivia on Baywatch itself.
  • Movie Nights's 50th episode was Allison and Phelous reviewing the Scott Bakula film I-Man. For the tenth anniversery of Allison making videos overall, she did a special Movie Nights episode on Little Monsters, her favorite movie as a kid.
• Almost every Scott The Woz season ends after 50 episodes, so naturally each Season Finale also doubles as a milestone celebration for Scott. The only exceptions so far are "You're Not An RPG Guy" which ended the season at Episode 195 and "Have a Bootleg Gaming Christmas!" which ended the season at Episode 259.
  • "A Very Madden 08 Christmas" just so happened to be the 50th episode.
  • "It's Awesome Baby!" is simultaneously the 100th episode and the Big Damn Movie.
  • "It's a Bargain Bin Christmas" is simultaneously the 150th episode and another Big Damn Movie.
  • "Borderline Forever" is simultaneously the 200th episode, and a literal Big Damn Movie, being 58 minutes long (1 hour and 3 with credits) and the longest non-Nintendo Switch: X Years In episode.
  • "Merry Christmas, Data Design!" is the 250th episode. Also, despite being a Christmas-themed episode it was released long after the Christmas season was over, which not only Scott acknowledges in the description but he also works that fact into the plot.
• This Very Wiki had a thread dedicated to celebrating 500,000 articles, with the special article being the page on Notebook Wars. Lesser milestones are instead noted on this page.
• Podcast Like It's 1999, a retrospective of films of 1999 (plus other pop culture, mostly in bonus episodes) had its hosts celebrate their 99th episode by discussing Man on the Moon with Tig Notaro as the first half of a rare two-part episode — meaning Part Two was Episode 100 for a more traditional milestone.
• Soyjak.party celebrated its second birthday by changing usernames from "Chud" (equivalent to 4chan's "Anonymous") with "🎉 2 years! 🎂".
• CinemaSins:
  • To celebrate 10 years, the team re-sinned several movies they had already previously sinned. In order, these are: Frozen, Batman Begins, The Avengers, The Hunger Games, The Dark Knight, Prometheus, The Amazing Spiderman, The Amazing Spiderman 2, Avatar, and The Dark Knight Rises.
  • Their 1000th movie sinned was Everything Everywhere All at Once. Similar to the movie's multiverses, it goes through a multiverse of CinemaSins, which includes a universe with a different primary narrator, a British CinemaShortcuts universe, a podcast universe, a livestream universe, a Stimulation Simulation universe, and a "dumb" universe. Only the narrator of the main universe appears to be aware of the different universes.
• Caddicarus's 1 million subscriber special has him going over every main Spyro the Dragon game, his most requested topic since he had started his channel. It is also easily his longest video yet—while his recent videos had reached the one hour mark, this one is nearly two and a half hours long.
• Nobody Here: "Trash" was released to celebrate the site's 25th anniversary. It features many references to earlier stories on the site.

Other

• The King of Sweden sends a Happy Birthday-card to every Swedish citizen on their 100th birthday.
• Think! UK commemorated the 50th anniversary of their campaign in 2014 with a PIF featuring first responders singing Kool and the Gang’s “Celebration” while attempting to revive a victim of a DUI wreck. A caption explained in 50 years, the number of annual British drink driving deaths had fallen from a high of 1,640 to 230…which is still 230 too many, as shown by the Death Notification at the end.
• Chuck E. Cheese:
  • The animatronics show has a song called "Every Boy, Every Girl" that gets remade every ten years that tells the story of the franchise and how the group of characters was formed, using a different arrangement, a different number of years that have passed ^note  for the 40th anniversary edition, all the lyrics except for the chorus and "memories on every page" were replaced due to various retcons made after the 2012 retool and a different accompanying video, usually showing clips of kids at the restaurant alongside them. ^note  The original version showed the story via a scrapbook, the second showed Chuck E Cheese puppets in various parts of the restaurant being interviewed, and the third one was done in a storybook-esque style. It first appeared in 1997 for the franchise's 20th anniversary.
  • For the 30th anniversary, the classic CEC TV intro was brought back.
  • The 40th anniversary had intermission videos explaining the history of the restaurant that showed classic videos related to the decade being covered. Off note was the 1987 video, which was dedicated to Showbiz Pizza Place, their rival.
• When Belgian production company Studio100 celebrated its 20th anniversary in Belgium, it decided to create a special music video called "Feestje" featuring old and new Studio 100 characters singing together. They also performed the song at the company's annual "De Grote Sinterklaas Show" that same year in 2016. For the studio's 25th Anniversary, they made a song called "Festival" which featured their characters singing together, but was recorded separtely due to the COVID-19 Pandemic.
• It's not uncommon for vehicle manufacturers to produce a model as an anniversary milestone for the company, especially in the case of Cool Car manufacturers.
  • The Lamborghini Countach 25th Anniversary was produced in 1988 to celebrate 25 years of the company since the days of making tractors.
  • The 1987 Ferrari F40 and 1997 Ferrari F50, produced for the company's respective anniversaries.
• The 2021 release of the Monster Cereals, for its 50th anniversary, combined all five cereals together in to one special cereal, entitled "Monster Mash". Along with this cereal, a cover of the song of the same name was also released.
• The 90th Macy's Thanksgiving Day Parade featured a revamped balloon of Felix the Cat, who was one of the first fictional characters to receive a balloon.
• To celebrate Pakistan's 75th anniversary as an independent state, the State Bank of Pakistan introduced a 75-rupee note

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