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 universe, under Big Bang theory, have a birthdate? Your typical Big Bang chronology lists various events — e.g., the formation of the first atoms — occurring X number of seconds or minutes after the Big Bang, which suggests that time as we understand it goes back to the beginning, which further suggests that at least in principle, you could extend modern-day calendars backwards and say “Yeah, the universe began on such-and-such a Friday in the Year Whatever, BCE.” (In practice, of course, the information you’d need to do this might not be obtainable.)
Modern physics is nothing if not counterintuitive, though, so the above is quite possibly wrong. Anybody out there know?