Sure you can, just not by months, you would need to use weeks instead to retain integer values. A half year would be 26 weeks and a quarter year would just be 13 weeks. Of course this fails if you wish to divide further, but at that point you could just say 2 months and people would know for certain you are saying 8 weeks.
This shit happens in the parking garage I use too and it amazes me. I drive a small sedan and I refuse to park in those spots bc I’m terrified some idiot will sideswipe me (I have actually seen this happen to other vehicles). I can only imagine it’s some sort of flex bc people have to avoid their oversized tiny-penismobile.