DJs and producers know the 4 AM body clock well—when the set ends at 4:12 AM,...

https://paxtonsuniquenews.rivetgarden.com/posts/why-does-my-body-feel-like-it-s-in-four-time-zones-at-once

DJs and producers know the 4 AM body clock well—when the set ends at 4:12 AM, but the flight leaves at 9