Ok so we've been dating for a little over a month. When we first started talking I told him my birthday because we were both born in March and he asked the day. However this was a couple months ago and he forgets a lot of things, he's just forgetful. I don't wanna be like "hey my birthdays on Monday" because I don't actually expect a big to-do, but I mean, I want it to be acknowledged haha. So what do I say to sort of remind him? Without being annoying and just saying "hey Monday's my birthday btw". How do I bring it up?