8. The Dates
https://www.youtube.com/watch?time_continue=1&v=KKpPdGUcvf4 Inevitably, Halloween Horror Nights only runs on select dates; this year for a total of 31 nights between September 16th and October 31st. It might not sound a lot, considering the inevitable demand, but this is actually the most nights that Universal has ever offered guests to get their scares on and it really gives you no excuse to make plans to attend.