While I DO wish all those having birthdays a good day and happiness in the coming year, I for one hate it when people come up to you and say, "It's my birthday next week." Almost as much as telling me a family member just died. 

Don't mean to be rude but if I cared when your birthday was, you wouldn't need to tell me, I'd remember. I might even have sent you a card. Trying to solicit a happy birthday response from a casual acquaintance is tacky.