Would it be tacky to announce my pregnancy on Mother’s Day?

So

I still haven’t announced because my grandparents didn’t know I was pregnant until a few days ago (we don’t have a good relationship with them). I’m 23 weeks today and I would love to announce because my fiancé got me this cute pregnancy announcement board that I’ve been wanting from Target. I really want to announce today but that feels tacky? Idk, What do y’all think?