Method used to show the passage of time by repeatedly flipping/tearing off pages of a calendar.
A variation is several shots of calendar pages with consecutive days marked off by large X's to show progress toward a specific, final day which is marked with a large circle.
Compare Spinning Clock Hands, Spinning Newspaper.
Strictly Ballroom has a well-known blooper in which the exploding calendar has the top page ripped off it so vigorously it exposes the fact that every page of the calendar is marked "November".
Donnie Darko has the marked-calendar version counting down to the end of the world.
The Blue Angel has an interesting lead-in to this, where somebody asks the main character for a sheet of paper. After looking around, the only paper he finds is the calendar page, which he pulls off, and then this leads to a scene of the rest of the pages going away.
The film The Bellboy shows this happening to a day calendar in February...which promptly goes past February 28th and winds up around February 37th before fading out.
Lampshaded in Night Watch, where as Vimes traveled back to the present, he felt slightly cheated that something like this didn't happen.
Also lampshaded in Wyrd Sisters when the witches move the kingdom of Lancre 15 years. Terry Pratchett explains how such timeskips are easy to show in movies, where they can just blow up a calendar or let the sun rise and set like crazy. He concludes that this is much harder in books.
The Daily Show used this device to illustrate the time from the start of a recession to the time economists recognize it as such. At that point, John Hodgman explains, they had to boil their calendars to make soup.
Played for laughs in Pairof Kings, with an open window being responsible for the flying pages.
In Sledge Hammer a ventilator is responsible for the calendar pages flying off.
Used in Dinosaurs. Earl frantically tries to stick the previous day back on.
David Bowie's Short Film / long-form video Jazzin' for Blue Jean does this with a page-a-day calendar to pass the days between the protagonist meeting his dream girl and the day of a big concert he promises to take her to — but it's suggested the pages are actually blown off all at once on the big day by his hair dryer as he primps, as he's set it on its most powerful setting.
The Simpsons episode "Bart's Girlfriend" has a parody of this device, showing Bart marking off a series of days only to conclude, "There. I just need to make it this many days," and re-mark the first day.
The Simpsons also subverted it in Simpsons Comics, where three characters have been trapped in the trunk of a car. The next shot is of several pages falling off a calendar. Homer looks at the calendar, saying, "Stupid bank calendars. The cheap glue they use never lasts past March."
They would subvert this again later on, when Gil comes to live with them temporarily (which turns into almost an entire year). A day-per-page calendar is used, stopping on seemingly random days and/or days with obscure of barely celebrated holidays. It even stops on creator Matt Groening's birthday.
Superman: The Animated Series plays with this trope in an episode featuring Superman's wacky nemesis from the Fifth Dimension, Mister Mxyzptlk. While Mxy is busy constructing his latest invention with which to threaten Superman, the months fly by on his calendar: May, June, July, George, Relish, Pants.
Used a few times in Garfield and Friends to mark the passage of a lot of time, generally with some trick to it (like the episode where Garfield wished for no more Mondays, and got his wish; the calendar that "exploded" had no Mondays in it). Parodied at least once in a U.S. Acres segment where several months passed without rain; a monthly calendar lost several pages in this manner before Orson (as narrator) interrupted with "Hey, would somebody fix that calendar?"
Used near the beginning of Cellbound, with years rapidly flying out of the calendar towards the screen.
The Futurama episode "Roswell the Ends Well" does this in reverse. As the characters travel back in time through a Negative Space Wedgie, the ship's digital chronometer ticks backwards, eventually turning into a 1947 pinup calendar.
In the Mike, Lu & Og episode "A Freudian Split", we hear Goat and Pig argue with each other as a calender appears to reveal "One Week Later" and "Two Weeks Later".
In one segment of Rocky and Bullwinkle, Bullwinkle mentions things to demonstrate the passage of time, including pages falling off a calendar. When he grows a beard, he puts a few pages back on.