It doesn't matter to me because I don't feel my age at all, nor do I look it. I never played the numbers game. We can go at any time, so another day on Earth is another thank you to the man upstairs.
It means one more day to write one more thing, to meet one more person or say I love you to someone that matters or needs to hear it. It's a beautiful thing. And when the clock stops, I have no regrets. Being a non-believer of death, birthdays don't bother me. And the clock is just a reminder to do good while you're still here.