“The 9[am] to 5[pm]” is a common term for one’s regular job, on the basis that normal people start work at 09:00 and finish at 17:00. I’ve worked a few jobs and closest I’ve ever gotten to this is 08:00 to 17:00, which I gather is standard.
Are there real jobs where people actually start at 9 and finish at 5?
Technically no, in actuality, yes. I can start and finish as long as my hours are my contracted hours, but I have a daily meeting at 9 so I start my day with that meeting everyday. And then if I work normally, I finish at 5