Pico Day

Pico Day is an anniversary celebrated on Newgrounds, taking place on either April 30th or May 1st. It was originally created as an annual celebration of Pico, but later evolved into an annual celebration of Newgrounds as a whole.

It is celebrated on April 30th (or May 1st), which is Pico creator Tom Fulp's birthday.

History
The character Pico made his first appearance in the 1999 flash game Pico's School, which made as a response to the Columbine High School massacre. He later became a mascot of Newgrounds and appeared in various other flash games, most notably Friday Night Funkin' (2020). The anniversary celebration dedicated to him began in 2007 and has been an annual tradition ever since.

Henry Stickmin and Ellie Rose appear in the front page banner for Pico Day 2021. PuffballsUnited reacted positively to their inclusion, stating that he'd been wanting Henry to appear in a front page banner since the release of Breaking the Bank.