Birthdays what's the big deal?

Why do people make such a big deal about birthdays? Is it the corporate commercialism of getting presents and gifts? Is it to let your ego balloon to large proportions 1 day a year, it's all about me, I'm Mr Important? To me it's just another frickin day in my existence, it signifies nothing to me, maybe to my parents it means more but not to me. And why the special importance of round numbers, why is 30 more important than 31 or 29. Nothing really different happens, regardless of the age of the individual past the age of 21. I guess i'm just pissed i haven't had any time to/for myself for many months now. I'd like to get away and just tromp through the gullys and fields, but I can't do that. I can't go where i want, when i want anymore, not for the last 3 years anyway. I feel somewhat trapped in that i have to plan out my existence way to many moons in advance. I keep asking, "What do you want to do for your b-day", no response. My sentiments exactly.