I remember reading some time ago that at some chains, schedules are generated by computers, and that a lot of employees often found they'd been scheduled to work until closing (often as late as 1 am), and then to open (often as early as 4 am) the next day. When I was younger I wouldn't have minded doing this once in a while, if there was a great need (and I did a few times), but it's not really something that is good for your health if it's every single week.
I believe workers at one chain referred to this as "clopening."