The twenty-ninth day of February (usually) comes only once every four years. As the only date in the calendar that doesn't occur in every year, it has some comedic potential, especially when it's someone's birthday: Any event happening on someone's "Xth birthday" won't actually happen until he's 4 times X years old. People whose birthday falls on Leap Year's Day are known as "leapers" (not like that)
Though this can be a hassle if said character wants to celebrate his birthday every year. One way to do this is to celebrate it on February 28 or March 1, so technically he'd still 'age' normally.
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Anime and Manga
- Superman's birthday is February 29. Yes, really. To be more exact, it was Feb. 29 on Earth on the day he was born on Krypton. He celebrates the day the Kents found him separately, as Clark Kent's birthday.
- In The Golden Age of Comic Books, Feb. 29 was also Captain Marvel's birthday. (Hey, maybe he and Superman were separated at birth!)
- In a manner of speaking... Golden Age Marvel Family writer Otto Binder eventually went to work for DC on the Superman titles in the Silver Age, coming up with many of the familiar Superman mythos elements (Krypto the Superdog, the Phantom Zone, Supergirl, etc.). This might explain some of the tone/elements of Silver Age Superman stories...
- It used to be that Leap Day was the day on which women could propose to men, instead of the other way around as was the informal custom of the time. Carol Ferris tried to take advantage of this in an issue of Green Lantern.
- Irish folklore has this as the day Saint Bridget struck a deal with Saint Patrick to allow women to propose to men. This is the premise of the 2010 Amy Adams film Leap Year.
- In Whit by Iain Banks, the Luskentyrian cult consider those born on the 29th of February to be sacred, so they have an orgy nine months before that date.
Live Action TV
- On Wings, Roy was born on Feb. 29 and held a birthday party for himself every four years, saying he was 10 when he was 40 or whatever the precise dates were. While Roy acknowledged his real age, the tradition was that everyone would throw him a kids' party based on his Leap Year age.
- The Frasier episode "Look Before You Leap" takes place on a Leap Day. Frasier encourages everyone to "take a leap" and try something new. One of Martin's friends was also born on Leap Day.
- The Middle: Sue Heck is a Leap baby who dreamt of actually celebrating her 15th birthday on Feb 29, 2012.
- Cameron on Modern Family is also a Leap Day baby. Phil also takes Feb. 29 off to enjoy this "bonus day".
- Jerry on Parks and Recreation was born on this day.
- 30 Rock: Leap Day William emerges from the Marianas Trench dressed in blue and yellow on February 29. There is even a movie about him starring Jim Carrey in the vein of The Santa Clause
- My Hero: Piers Crispin's father told him his birthday was on February 29th, thereby ensuring he only got one present every four years.
- In the Forgotten Realms setting of Dungeons & Dragons, there is a day called Shieldmeet, which occurs only once every four years on the day after Midsummer, making it an in-universe leap day.
- In The Pirates of Penzance, the Pirate King and Ruth inform Frederick that he is bound to serve them, not until his twenty-first year, but until his twenty-first birthday.
Through some singular coincidence—I shouldn't be surprised if it were owing to the agency of an ill-natured fairy—
You are the victim of this clumsy arrangement, having been born in leap-year, on the twenty-ninth of February,
And so, by a simple arithmetical process, you'll easily discover,
That though you've lived 21 years, yet, if we go by birthdays, you're only 5 and a little bit over!
- In And Shine Heaven Now, this is how Annie Warbucks explains how she looked no older than 30 (in 1998) and still could be alive during World War II: because she was born on this day, she ages at the quarter of a rate of a normal human. Of course, she could just be pulling Seras's leg. (That particular comic was posted on April Fool's Day, after all.)
- This is based on the canonical explanation for why Annie hasn't aged in sync with the real world, incidentally.
- Howard Tayler of Schlock Mercenary is among those born on February 29.
- Michelle from the webcomic Scrambled Eggs was born on February 29. The birthday parties this Dumb Blonde holds every four years have become Cool and Unusual Punishments for the other characters.
- In one Nedroid comic, Leap Day goes horribly wrong.
- As noted, Irish folklore marks February 29 as the day women are allowed to propose to men, explain as a deal Saint Bridget struck with Saint Patrick.
- As a curiosity, when Gaius Julius Caesar had the calendar reformed, the year 46 BC was made 445 days long to get up to date, making it the longest year in history.