Mostly because all three things - Christmas, Birthdays, and New Years - feel like annual watersheds. And somehow them being all lined up within the space of a week has always felt right.
When I was a young kid, I of course, couldn't wait to get older. Then, I was sad about getting older. But now, I think I'm realizing that it really doesn't matter all that much. Whatever I want, however I feel, it's going to happen. And to be fair none of it matters all that much anyway. In a beautiful joyful way, one person's life - or year - is barely a drop in the cosmic bucket.
It's a very freeing thought to me. It frees me of any pressure or expectations other than to be who I am fully. As Joss Whedon put it, "If nothing we do matters, then all that matters is what we do."
So I'm going to spend my birthday laughing with friends and family, and letting those memories burn themselves on my soul.