Archbishop Usher 

Archbishop Usher was the priest who determined that Jesus Christ was born 4004 years after God created the Earth. 

He said that the creation was at the beginning of the day Sunday 23 October 4004 BC (In the proleptic Julian calendar) which seems to mean that it happened at the end of previous day when the sun would have set, which would be hard to have happen if the Sun and the Earth had not yet been formed.

He did this based upon the 'highly accurate' dating in the Holy Bible.  Right!

I suppose it could be true if all of our scientific studies are wrong.

He seems to have been a Church of Ireland Priest which is sort-of a Catholic Priest that does not believe in all the things that the Catholic Church believes in but they seem to believe in a lot, or most, or at least some of them.

There are probably a fair number of people on the Planet Earth today that still believe this was the date of the Creation of the Universe.

(Info here from Wikipedia on 13 July 2010:  Links here are external to my website.) James Ussher (sometimes spelled Usher) (4 January 1581 – 21 March 1656) was Church of Ireland Archbishop of Armagh and Primate of All Ireland between 1625–1656. He was a prolific scholar, who most famously published a chronology that purported to establish the time and date of the creation as the night preceding 23 October 4004 BC, according to the proleptic Julian calendar.

Also see:

4004 BC 
1581 (AD) 
Archbishop Usher 
Creation of the Universe 
Day 1 of the Creation 
Earth 
God  
Holy Bible 
Jesus Christ
Planet

External Links:
http://en.wikipedia.org/wiki/James_Ussher