What exactly do you find silly?
People have been celebrating birthdays in one form or the other for thousands of years. Various statues of The Buddha have been made for thousands of years. The list goes on and on. Culture does change, but significant cultural touchstones don't change over a few centuries.
People have been celebrating birthdays in one form or the other for thousands of years. Various statues of The Buddha have been made for thousands of years. The list goes on and on. Culture does change, but significant cultural touchstones don't change over a few centuries.