"Archbishop James Usher"
James Ussher
Public DomainJames Ussher
Annales Veteris et Novi Testamenti
Public DomainAnnales Veteris et Novi Testamenti

 Archbishop of Armagh and Primate of All Ireland, James Ussher was a serious scholar, well respected in his time.  By compiling the periods of time listed in the Bible, he concluded that:

The Earth was created in 4004 BC

The Flood occurred in 2348 BC

The Exodus occurred in 1491 BC

And, curiously, Jesus was born in 5 BC.

He was by no means the only scholar to attempt such a chronology, and others, including Isaac Newton, came to similar conclusions.