Bats Day in the Fun Park is an annual goth gathering in Disneyland where hundreds of goths descend on the park and ride rides, punctuated by gatherings — a "Baby Bats" gathering for goths with infants, and a grand gathering at night-time before the Haunted Mansion for a group photo. The night before it starts there's a club night with DJs and live performance (including Bauhaus/Love and Rockets/Jazz Butcher alum David J).
This year's Bats Day dates have just been announced: August 27-28. Wish I could be there!
