In Gravity Falls, Summerween is celebrated on June 22nd, but since the episode first aired in 2012, this unofficial holiday has been celebrated any time during the summer!

Find out tonight on Gravity Fall ‘s spine-tingling twelfth episode. “Summerween” premieres at 9:00 PM PM ET/PT on Disney Channel.

The Pueblo Art Alliance hosted a Summerween-themed First Friday Art Walk last July. The Gravity Falls Summerween episode first aired in 2012.