|Composed by||Kazumi Totaka|
|Owned by|| Bunnie[nb 1]|
|Name in other languages|
Feliz en tu día
День рождения К. К.
"K.K. Birthday" is a K.K. Slider song that first appeared in Doubutsu no Mori e+ and later reappeared in Animal Crossing: New Leaf. It is considered a secret song, as it can only be obtained during a K.K. Slider performance on the player's birthday (or the Saturday before prior to New Horizons). It is not obtainable in Doubutsu no Mori e+, but it is performed by K.K. Slider. None of the villagers own this song, although it will play in a villager's house on the day of their birthday; if the villager already had a stereo with a song playing, it will be replaced by this song. In New Horizons, it is one of five songs that cannot be reordered via Nook Shopping once obtained; the other four are "Animal City," "Drivin'," "Farewell," and "Welcome Horizons."
The song's composition and melody is based heavily on the traditional "Happy Birthday to You" song, which was not in public domain at the time of Doubutsu no Mori e+'s release. However, it is much longer in comparison to its source material, with a more intricate structure and harmony.
The album cover for "K.K. Birthday" features a birthday cake decorated with white icing, strawberries, green lit candles, and icing toppers in the shape of Tangy holding a birthday present and K.K. Slider playing a guitar. An edible cookie at the center of the top of the cake reads "Happy," and text at the bottom of the album cover reads "Birthday." In New Leaf, the word "Birthday" is blue and in a horizontal format, while in New Horizons, the word is red and curved upward.
In Doubutsu no Mori e+
In Doubutsu no Mori e+, K.K. will perform "K.K. Birthday" on the closest Saturday prior to the player's birthday (or the actual day, if it naturally falls on a Saturday). There is no aircheck of this song.
In Wild World and City Folk
Although "K.K. Birthday" is not present as one of K.K. Slider's songs in Wild World and City Folk, a unique instrumental arrangement of the song plays as background music when the player is first greeted by another villager upon starting the game on their birthday.
In New Leaf
In New Leaf, "K.K. Birthday" can be played in villagers' houses during their birthday. It also plays in the house of the villager that invites the player during their birthday. K.K. will perform this song on the Saturday near the player's birthday. Unlike Doubutsu no Mori e+, K.K. gives an aircheck of this song. If the player's birthday is not on a Saturday, K.K. will also play a DJ remix on that day in Club LOL. (This is referenced in DJ K.K.'s trophy description in Super Smash Bros. for Nintendo 3DS.)
In New Horizons
In New Horizons, "K.K. Birthday" can be played in villager's house during their birthday. It also plays in the house of the villager that invites the player during their birthday. K.K. will also visit the island solely to perform this song on the player's birthday regardless of the day of the week, after which he will give the player the aircheck.
In Happy Home Designer
In other media
Names in other languages
- In Happy Home Designer only
- Min'na de tanoshimu Atsumare Doubutsu no Mori (sutekkā-tsuki), Enjoy with Everyone Animal Crossing: New Horizons (with stickers)