For all of you ‘young earth creationists’ out there – October 23 is Creation Day. James Ussher, an Anglican bishop who published in 1654 a brilliant study that tried to sort this out (false or not, it is an ingenious bit of biblical scholarship). He claimed that the world was created on October 23, 4004 BC. While there are other accounts, Ussher’s chronology was the most widely accepted.
Such attempts were not all that uncommon in his time. I know of several theologians who tried to date the universe and other events in this way (I know Newton at least dabbled in this, and made a concerted effort to determine the exact date of the crucifixion).