Happy Birthday Theymos and Happy Father's day to everyone too!!!. 
I really doubt his Birthdate presented here, and also might also have a doubt if he's a father 😂 Beside it was already mentioned here:
Do you guys actually think today is his birthday and he's actually 28years? I doubt any of those are correct as his experiencing & Management skills are way above a young adult capacity (technical speaking) considerimg when he took over management.
You are right on theymos's viewpoint, that has been more matured than 28-years old guy. However, theymos disclosed his age in the past. 6 years ago, theymos was a student.- During the school year, I am a full time student. I barely have time to administrate the forum.
What ever it is, this is just the first time I'm seeing this greetings to our admin... Oh well, Happy Birthday Admin (Might be Belated or an Advance). Thank You for staying and not leaving bitcointalk just like what Satoshi did back then.