when does horror nights start

Halloween Horror Nights 2025 at Universal Studios Hollywood starts on September 4, 2025, and runs on select nights through November 2, 2025. The event typically begins at 7 p.m. each night and features haunted houses, scare zones, and other attractions. The event dates include September 4, 5, 6, 7, 11, 12, 13, 14, 16, 18, 19, 20, 21, 25, 26, 27, and 28, and October 2, 3, 4, 5, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26, 29, 30, and 31, plus November 1 and 2.