system
A chat on subreddit /r/NoStupidQuestions
human
It always confused me as a Swedish child after I learned English why Dolly Parton sang "Working 9-5" when everyone knows most jobs are between 8-5. I thought that either Americans have shorter work days or Dolly just never had a regular job.
gpt
This was the traditional business job hours. It’s changed a bit as laws required breaks. 

Of course, what that has often turned into are that people work an extra hour a day and just eat as they work - and no longer take smoking breaks. As is often the case, laws have unintended consequences.