Contacting ex on his birthday?

Anonymous
I broke up with him four months ago.He was a great guy. We got along pretty well. There wasn't any fighting or cheating going on. It was bad timing for me. We have had no contact for three months now. He said we could be friends and that he would always be there for me, but he never once initiated contact after the break up. I had initiated breaking up before, so I understand now he was sick of it. His birthday is coming up soon and I don't want to ignore him on that day. I do care a lot about him, but never fully opened up to him the way I wish I could've.

Just wondering if I should contact him on his birthday and if it should be a call/text/email? I really want to talk to him and tell him everything I wanted to say at the end, but I'm not sure if this would be a good time to do so. I just don't want this to ruin the chance of possibly talking to him in the future.

Thanks!
Updates
+1 y
I'm thinking I may just leave him alone. I don't want to ignore him, but I also don't want to ruin his birthday.
Contacting ex on his birthday?
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