April Fools events

Like most music games, SEGA's music games also have April Fools events each year around April 1st.

In 2020, due to w:COVID-19, April Fools events for all games were postponed indefinitely.

maimai

2013: セガサターン起動音 (NOT [H.][Remix]), playable on development cabs in SEGA only
2014: Site changed to "The world of three kingdoms"; 犬日和。 sung by はっぴー (4/1 only) [1]
- Revived in 2019 as 犬日和。(はっぴー歌唱Ver)
2015: 全世界共通リズム感テスト (4/1 only) [2]
- Expert and Master charts revived in 2019
2016: Wonderland Wars オープニング (4/1~4/7) [3]
- Revived in 2019
2017: Garakuta Doll Play ガラクタ総選挙, 犬日和。宴星 (3/31~4/6) [4]
- GDP No.1 and 犬日和。 revived on 2017/06/22 (MURASAKi+ release date)
- GDP No.2~No.5 Revived in 2019
2018: 疾走あんさんぶる宴協, ミラクル・ショッピング宴蛸 (4/1~4/8) [5]
- Playable normally since 2018/05/08
2019: 怒槌～光吉猛修一部謎～宴宴 plus aforementioned revivals as 宴 attribute charts (4/1~) [6]
- 怒槌～光吉猛修一部謎～ is part of a cross-game event called AnotherVisionへの挑戦. Charts in all 3 games, as well as the background video in maimai, contain puzzles that need to be solved. After entering the answers to the puzzles on the website (now closed), serial codes for in-game items in all 3 games were given as rewards. This event was not considered part of the regular April Fools events, and 怒槌～光吉猛修一部謎～ was not revived in subsequent years in CHUNITHM and ONGEKI.
2020: Site changed to "maimai でらっくす TSUKEMEN"; 六厘歌 (postponed) [7] [8]

All April Fool WE charts were revived in subsequent years.

2016: Help me, あーりん！ (4/1~4/6) [9]
- Playable as イロドリミドリ Crazy Set Track 3 outside of April Fools
2017: あねぺったん (3/31~4/5) [10]
2018: イロドリミドリ杯花映塚全一決定戦公式テーマソング『ウソテイ』 (4/1~4/4) [11]
2019: なるがちゃんなぎにいよいよえれー目にあわされる話 (4/1~4/10) [12]
2020: 【3Dサウンド】小野ちゃんが真夏のビーチでスイカを叩き割る話【イヤホン推奨】 (postponed) [13]