Should I say "3 half days" or "3 half-days" or "3 half-day"? I mean I want to refer to, for example, the a.m. of Monday, the p.m. of Wednesday, and the a.m. of Friday, together.
I think the answer should be "three half-day". For Ex: I have taken three half-day leaves.
We cant't use plural nouns with compound adjectives.