Does it make sense to say "PM shifts"?

[grammarguy]

My friend told me that he is working a PM shift five days a week. I believe he meant either an afternoon or an evening shift.

Is it correct to say "a PM shift"? Thanks for your help.

[Josef Essberger]

I've never heard this expression but I suppose your friend means he works from 12 noon to 12 midnight. That is the literal meaning of PM or post meridian.

post = after
meridian = noon