Smile sincerely and that is all it takes.
Umm most likely you'd say thank you or maybe if their birthday is that same day (which is unlikely,) say you too.
ufaa veri ufan dhuvahakah edhen.. :-)
生日快乐- (shēngrìkuàilè) - Happy birthday
Mnohaya Lhyta is God Grant You Many years...it's the religious equivalent.
The Pursuit of Happiness Is Making You Miserable
How to Find Happiness in Self-Help Books
The Duality of Happiness
Is Loosing Weight Making you Happy
