Father's Day question. I have never been close to my dad. We don't even exchange Christmas cards. So…

Father's Day question.

I have never been close to my dad. We don't even exchange Christmas cards. So I'm not sure the Father's Day protocol. I found out a few weeks ago that I'm pregnant. And I have not told my SO yet. We've suffered four MC so far so I just wanted to wait a bit longer. But I feel like maybe I should tell him on Father's Day. None of my other pregnancies fell around this time so I haven't been in this situation. I'm not really sure what to do. Any insight would be helpful.