“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?
One of the jobs I had was 9am to 5pm for about a year. For me, that was practically heaven because prior to that it had been 9am to 6pm for a few years, and the shorter hours didn’t come with a pay cut.
It got weird later because I took on a rotating shift pattern and more responsibility, but some of the day shifts were still 9 till 5.
Then I jumped ship to a different company that had 9am to 6pm again, but that turned out to be preferable to the hell of not being able to sleep properly.