I am 33 now, still get some cash from my parents, cake and presents from my wife, but my wife doesn't work, so I sort of pay for my wife to buy stuff for me, I would never buy for myself.
My sister always calls me a day or two after my birthdays. I never brought it up but it obviously she forgets my birthday and my mum calls her up to remind her, because one of the first things my mom asks me is if my sister called already. But I don't care at all, I don't like to be the center of attention anyway. I would probably forget a lot of birthdays myself if my wife wouldn't keep track of those things.