Universal's Halloween Horror Nights (originally Universal Studios Fright Nights in 1991) is an annual Halloween-themed event at Universal Studios theme parks in Orlando, Hollywood, Japan and Singapore. The event was originally named Universal Studios Fright Nights in 1991 and began as a 3-night event at Universal Studios Florida. The following year, it re-branded as Halloween Horror Nights, advertised as the "second annual event". Since then, it evolved into a scare-a-thon event filled with themed haunted houses and scare zones, over the course of select nights from early September until late October/early November. The event was held at Universal Studios Florida from 1991 until 2001, when Halloween Horror Nights moved to Universal's Islands of Adventure in 2002. In 2004, a dual-park format was tested, which opened parts of both parks. Since returning to Universal Studios Florida in 2006, the event has been held yearly, with the exception of 2020, when it was canceled due to the COVID-19 pandemic, making it the first year that Halloween Horror Nights was not held since its inception. The event later resumed with its 30th year in 2021. History The event was originally named Universal Studios Fright Nights in 1991 and began as a 3-night event at Universal Studios Florida on October 25, 26, and 31, 1991, with one haunted house, The Dungeon of Terror. From 1991 to 2001, the event was held at Universal Studios Florida. The event was renamed Universal Studios Florida Halloween Horror Nights in 1992 and advertised as the second annual Halloween Horror Nights. There were two haunted houses, with The Dungeon of Terror returning and The People Under The Stairs making its debut in Soundstage 23. The event ran five nights, October 23–24, 29–31. In its third year, the event saw an increase to seven nights and the number of haunted houses increased to three, with the third at the Bates Motel film set. For its fourth year, in 1994, Halloween Horror Nights expanded to an eight-night run with the return of a newly designed Dungeon of Terror haunted house, along with three more haunted houses. In addition to Nazarman's and the Bates Motel film set, the new locations were in the Earthquake overflow queue and the Boneyard. This year also marked the first use of the term "Scaracters", as well as the first official "Ghoul School" for actors participating in the event. Ticket prices increased to $36 this year. Halloween