<human>: My work recently told me we're going to a 13 month year for pay at 28 days a month.

365 days a year divided by 13 months being 28 days.  I read that 13 day months are big in Europe but not here in America, so I figured this was legal. My problem is that 1 I am not so sure they're planning to give us the 13th check that I've come to understand you would normally get and 2 I am having a hard time understanding how overtime works.

Part 2:
My boss told me that they pay us on a 173 hour a month pay period. (I am salary) But they are doing 28 day months. 28 days divided by 7 days a week = 4 weeks. From what I understand FLSA says anything over 40 hours is considered over time. 40 a week time 4 weeks is 160 hours. How can my job tell me I have to work 173 hours in a 28 day month before claiming over time when I'm actually working 3.25 hours over the 40 hours a week?
can someone explain this to me? I am trying to make sense of it but it just doesn't compute to me. I feel like I am really losing out on a lot of over time like this.

Can you summarize the given text in a few sentences?
<bot>: I work 13 months a year instead of 12, and 173 hours in 28 days instead of 160 but don't get paid over time.