You have the sign for 8 months? The whole school year? Usually it’s put up around graduation time.

I’d remove the sign and maybe briefly display it right before actual graduation. Or put a sign on the door rather than front yard. Or better call your HOA and ask what’s best. I’d say it’s petty for them to demand “no signs” if you put it up around graduation time, but to keep it all year around is kind of unusual. Other people could argue they want to keep wedding or baby announcements for the whole year too etc there is no limit then what people could keep on display all year round .

Is this a condo? They usually are strict about uniform look