DJs and producers know the 4 AM body clock all too well — mixing beats at 4:12...

https://www.side-line.com/what-nocturnal-work-does-to-producers-and-djs/

DJs and producers know the 4 AM body clock all too well — mixing beats at 4:12 AM, facing a 9 AM flight, then sliding on sunglasses for the ride home