This has absolutely nothing to do with numerology. It is based on the holy bible in it’s entirety. Wikipedia has a pretty good non bias page:
About 40 years ago Harold Camping published a book called Adam When? laying out a timeline with all the evidence from the bible. 4990 BC was established as the date of the Noachian flood. It has withstood the test of time and cannot be disputed with biblical or secular scientific evidence. In the early 90’s he published another book called 1994? where he proposed the possibility of Christ’s return. He also indicated 2011 was a possibility. Quite astounding evidence(from the bible) was produced a couple of years.
*“For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: Whereby the world that then was, being overflowed with water, perished: But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men. But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.” *2Pet3:5-8
The context in 2Peter is clear. God is also clearly emphasizing the importance of verse 8 by telling us not to be ingnorant of this one thing concerning the first destruction of the world and the final destruction. The relationship between one day and a thousand years is further emphasized by repeating it in the same verse.
“*For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living substance that I have made will I destroy from off the face of the earth.” Gen 7:4
Gen 7:11 “in the second month, the seventeenth day of the month”. *
This is May 21 when converted to the gregorian calendar.
When converting from the biblical calendar to our modern day Gregorian calendar, the date of the first destruction of the world was May 21, 4990 BC. This is precisely 7,000 years, to the very day, prior to May 21, 2011. Keep in mind, this evidence was first submitted over 15 years after the possibility of May 21, 2011 was introduced.
There is not one instance in the bible where God executes judgment without a so-called “date setter” involved.
The only argument against this is. Matt 24:36, Mark 13:32, and Acts 1:7. The remainder of the bible is ignored by most.
“But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only. But as the days of Noe were, so shall also the coming of the Son of man be.” Matt 24:36-37
"The lord of that servant shall come in a day when he looketh not for him, and in an hour that he is not aware of, And shall cut him asunder, and appoint him his portion with the hypocrites: there shall be weeping and gnashing of teeth." Matt 24:50-51
“*Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.” *Rev 3:3
Will he come upon us as a thief if we watch?
"Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep. All that ever came before me are thieves and robbers: but the sheep did not hear them.
I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture. The thief cometh not, but for to steal, and to kill, and to destroy:" John 10:7-10
If god comes to us as a thief in the night, “sudden destruction” will come upon us.
“But of the times and the seasons, brethren, ye have no need that I write unto you.* For yourselves know perfectly that the day of the Lord so cometh as a thief in the night**.
For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.** But ye, brethren, are not in darkness, that that day should overtake you as a thief**. Ye are all the children of light, and the children of the day: we are not of the night, nor of darkness*.”
The bottom line. Individuals cherry pick the verses I have referenced as an argument against May 21,2011. This is normally the extent of the evidence provided. Most christian religions put the Noachian flood at around 2500 BC. We have found human writings(rock art marking astronomical events older than this). A tree is still standing in California that is 4,842 years old(several hundred years prior to the widely excepted date). We only need to count the tree rings. Unlike radiometric dating(which is an extrapolation or guess), these dating methods are very reliable.