Halloween Horror Nights 2025 starts on different dates depending on the location:
- At Universal Studios Hollywood, the event begins on September 4, 2025, and runs select nights through November 2, 2025. The event starts around 7 p.m. each night there.
- At Universal Studios Florida (Orlando), Halloween Horror Nights 2025 starts earlier on August 29, 2025, and also runs through November 2, 2025, on select nights.
So for Halloween Horror Nights 2025, the earliest start date is August 29 in Orlando and September 4 in Hollywood.
