When you're in your twenties, you celebrate your birthday. And the early twenties birthdays are way more exciting than late twenties birthdays.
By the time you're in your thirties, you stop celebrating your birthday, since you realize how much it sucks to get older.
When you're in your forties, though, you start celebrating your birthday again, since you're surprised you made it another year without dying.
At least that has been my experience.
Happy Birthday TJ, whatever stage of life you are at.