After spending all Saturday night embedded in a motel with naught but a slide rule and a bible; we now know what went wrong.
Reporter "Well Harold it looks like we are all still here?"
Harold Camping "Yes, the slide rule I was using was apparently made by Gay Agenda Inc"
Reporter "So the gays are to blame for your calculations?"
Harold "Indeed; and as we all know mathematics is the devils work ."
Reporter "But you said you used mathematics to calculate the end of times"
Harold "I used God's holy numbers and I blame the unholy ones for getting in the way"
Reporter "So some number are not holy?"
Harold "Yes; and don't forget Satan's multiplication sign, I have now decided to add rather than multiply and have replaced the slide rule with a pile of matches."
Reporter "Did you find the discrepancy?"
Harold "It appears that the pagan Julian calender and the critical mass of gays in fact bent the space time continuum.."
Reporter "Hold on....you believe in science"
Harold "No, I'm just saying that this is where the error was,..."
Reporter "Why didn't you just use a calculator in the first place"
Harold "Back foul demon you seek to corrupt me!"
Reporter "So you have a new date?"
Harold "Yep, October 21st"
Reporter "So the 21 still works"
Harold " Yes, the lord rested on the seventh day and we all know there is a holy trinity so if you add seven matches three times you get twenty one"
Reporter "So why 2011?"
Harold "It looks a lot like 21".
Reporter "Oh dear God"
Harold "Amen".