DJs and producers often find themselves locked into a 4 AM body clock,...

https://www.bookmarkingvictor.win/most-djs-and-producers-hit-their-peak-creativity-just-as-the-clock-strikes-4-12

DJs and producers often find themselves locked into a 4 AM body clock, performing when most people sleep. One track ends at 4:12 AM; the next starts before sunrise