From Inside Edition.

Trick or treat in June? It’s called "Summerween," an early celebration of ghouls and goblins. Many who can’t wait until October 31 are taking to social media to celebrate. Some folks are decorating their homes and wearing costumes. Bonnie Barton, who loves early Halloween, spoke with Inside Edition. The first known reference to Summerween was the animated show "Gravity Falls." Fans of the show got in on the act, and Summerween slowly began catching fire, now it’s in full swing.