“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?
Where do you live? In Germany it’s common to work only 8 hours on a work day. I’ve had jobs in software development where you had flexible enough times that you could choose to work 9-17:00, though flexible times isn’t quite what “9 to 5 job” implies.
That would be illegal though, above 6 hours of work you are required to take a 30 minutes break.
True, it’s usually 7,5h work days if you’re not doing overtime or part time.