system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do we make our weekend parties run during the hours we normally sleep? Why not party and disco during the hours we are awake every other day of the week?

I have party/disco thing this weekend and it starts at 10pm and goes until 4am. The most normal sleeping times I would expect are something like 10pm to 6am (maybe 12am to 8am but whatever). The point is that everyone sleeps during these times every night of the week - then suddenly, STOP that, it is time to party when you are meant to sleep! Then sleep when you are meant to be awake for precisely ONE day, then return to your normal sleep-work pattern.

Why not just dance and party during the day?
gpt
People in their 20s and early 30s often have to work weekends and may have other errands to run during their days off.  By putting the start time late at night you're ensuring that everyone is actually available.