Leap Day/2015-16 announcements

A list of previews an announcements for Leap Day from 2015 to 2016. {{Gallery|type=Leap Day preview image|
 * March 30th, 2015 - Leap Day was announced under the name Project Jump, and three mockup images shared
 * December 23rd, 2015 - A Youtube video of Leap Day's gameplay was released along with more details about its gameplay.
 * January 20th, 2016 - Mat Annal posted on his Twitter account a screenshot of Leap Day
 * January 30th, 2016 - Mat Annal posted on his Twitter account a screenshot of the room used to buy a checkpoint
 * February 11th, 2016 - Nitrome announced on Twitter that Project Jump has been renamed "Leap Day" and shared a screenshot of the game.
 * February 20th, 2016 - Mat Annal shared on his Twitter account two screenshots of Leap Day.
 * February 22nd, 2016 - Mat Annal shared on his Twitter account a mock-up image of the Waterfall background.
 * February 27th, 2016 - Mat Annal posted on his Twitter account a screenshot of a level that uses the Castle Beanstalk background
 * February 28th, 2016 - Mat Annal posted on his Twitter account another screenshot of a level that uses the Castle Beanstalk background
 * February 29th, 2016 - Nitrome posted on Twitter a screenshot of the game.
 * March 28th, 2016 - Mat Annal posted on Twitter a level that used the desert background.
 * April 2nd, 2016 - Nitrome posted on Twitter a level that had Cactus Monsters.
 * April 3rd, 2016 - Nitrome posted on Twitter three previews: a level that had Mud Monsters, a level that had a piece of scenery that showed two characters watching the game's protagonist on a television, and a level that had an egg.
 * April 5th, 2016 - Nitrome posted on Twitter a level that had a selection of scenery that showed two characters inside a house watching the game's protagonist on a television.
 * April 21st, 2016 - Nitrome posted on Twitter that the game had been submitted to the Apple App Store and Google Play and also posted an image of an king-like character on his throne pulling a lever.
 * April 22nd, 2016 - Nitrome posted on Twitter an image of the Gold Cup goal for one level and on Youtube a video of the generated level for April 20th, 2016.
 * May 4th, 2016 - Nitrome posted that Leap Day will be released on May 11th and also posted a trailer of the game on Youtube.
 * May 7th, 2016 - Nitrome posted on Twitter an image of the day select screen and highlighted how it displays achievements gained on each day.
 * May 8th, 2016 - Nitrome posted on Twitter an image of the Gold Cup at the end of a level that has a Fruit Crown.
 * May 11th, 2016 - Nitrome posted on the Nitrome blog, Facebook, and Twitter that Leap Day was released.
 * May 19th, 2016 - Nitrome posted on Twitter an image of unlockable characters that would be added in a future update.
 * May 25th, 2016 - Nitrome posted on Twitter an image of the "free unlock" chest which would be added in the adjustments update for players who have bought premium.
 * June 3rd, 2016 - Nitrome posted on Twitter an image of the sharing feature that was added in the adjustments update.
 * June 9th, 2016 - Nitrome posted on Twitter a screenshot that shows during a level Yolk's second selfie pose and mentioned that they were testing Update 1.
 * June 10th, 2016 - Nitrome posted on Twitter an image of the updated calendar in Update 1.
 * June 10th, 2016 - Nitrome posted on Twitter a Selfie screenshot of Yolk among Stone Monsters.
 * June 11th, 2016 - Nitrome posted on Twitter an image of Lick on the character select screen.
 * June 11th, 2016 - Nitrome posted on Twitter an image of Lick in a level.
 * June 12th, 2016 - Nitrome posted on Twitter an image that shows a screenshot of a Selfie cam image with Lick performing its first Selfie pose.
 * June 13th, 2016 - Nitrome posted that Update 1 had been released.
 * June 14th, 2016 - Mat Annal posted on Twitter a mockup image of a background that he was working on.
 * June 15th, 2016 - Mat Annal posted on Twitter an image of art that was being created for the Totem background which is going to be introduced in Update 2.
 * June 16th, 2016 - Nitrome posted that they were working on Update 2 and mentioned the new content it would introduce.
 * June 19th, 2016 - Nitrome posted on Twitter an in-game Selfie cam image of a level that has the Totem background.
 * July 1st, 2016 - Nitrome posted on Twitter that Update 2 would be released the following Monday (July 4th, 2016).
 * July 4th, 2016 - Nitrome posted on Twitter that Update 2 had been released.
 * July 5th, 2016 - Mat Annal posted on Twitter an image of art that would be used in the beach background, a new background that was being created for Update 3.
 * July 7th, 2016 - Nitrome posted on Twitter an image of Kepi in an End Zone.
 * July 8th, 2016 - Nitrome posted on Twitter an image of Meep in an End Zone, the same one as on July 7th, 2016.
 * July 9th, 2016 - Nitrome posted on Twitter two images of the Beach background and also mentioned that it would have new music.
 * July 13th, 2016 - Nitrome posted on Twitter that Update 3 will be released the following day and also posted a short video of the July 14th, 2016, End Zone.
 * July 15th, 2016 - Nitrome posted on Twitter an image of hazards that they were working on implementing into the game.
 * July 22nd, 2016 - Mat Annal posted on Twitter an image of the electricity background, which was planned to be added in a future Leap Day update.
 * August 19th, 2016 - Nitrome posts on Twitter a video of a new trap that will appear in Update 4.
 * September 1st, 2016 - Nitrome posts on Twitter that Update 4 has been released.
 * September 6th, 2016 - Nitrome posts on Twitter that that they are aware of the Magical switches bug.
 * September 12th, 2016 - Nitrome posts on Twitter that Update 5 has been released on the Apple App Store and has cloud saving, and that the Google Play version has been held back due to a bug.
 * September 14th, 2016 - Nitrome posts on Twitter that the stickers update has been released.
 * September 17th, 2016 - Nitrome posts on Twitter that they are aware of the barrel cannons glitch.
 * September 19th, 2016 - Nitrome posts on Twitter that they are aware of the Cactus Monsters, barrels, and lag glitches, and that looking into finishing cloud saving for the Android version of the game.
 * September 20th, 2016 - Mat Annal posted on his Twitter account an image of an in-development background.