Well, according to one Harold Camping, the Rapture will take place tomorrow, May 21, 2011. I am not sure just how he arrived at the date, though the article I linked to provides an explanation;
Harold Camping’s homemade mathematical formula for the apocalypse works, in part, like this.
He bases it on a verse in Chapter 2 of Peter verse 3:8, which says that one day is like a thousand years and a thousand years is like one day to God.
Elsewhere it is said that there will be seven thousand years between Noah’s flood and the end of the world.
Camping believes that the Noah’s Ark flood happened in the year 4990 BC.
So to Camping, the seven days translates to 7,000 years.
And 4990 plus 2011, minus one because there was no year ‘0’, equals 7,000 years.
The date of May 21 has been derived from complex mathematical formula made up from numbers that appear repeatedly in the Bible.
And apparently people are organizing “Rapture Parties”. I think Mr. Camping would be well advised to reread his Bible, particularly Matthew 24:35;
36 “But as for that day and hour no one knows it – not even the angels in heaven – except the Father alone.