Does the universe have a birthdate?

Via jaylake , Andrew Wheeler notes that yesterday was the 6012th anniversary of God's creation of the Earth, according to James Ussher's chronology.

These days, of course, the enlightened view is that God did not create the Earth 6012 years ago, but rather that the universe sprang into existence for unknown and possibly unknowable reasons approximately 13.7 billion years ago.

But thinking about Archbishop Ussher got me wondering: Whether or not it could ever actually be calculated, does the uni...