610 - In Islam, the traditional date of the Laylat al-Qadr, when Muhammed began to receive the Qur'an.
So does this make sense for 9/11:
September 11th - see http://en.wikipedia.org/wiki/September_11
1978 - U.S. President Jimmy Carter, President Sadat of Egypt and Prime Minister Begin of Israel met at Camp David and agreed on a framework for peace between Israel and Egypt and a comprehensive peace in the Middle East.
2006-08-10 AD [Gregorian]
0163-08-10 BE [Bahai]
1722-12-04 AM [Coptic]
1998-12-04 ZH [Ethiopic]
5766-05-16 AM [Hebrew]
1928-05-19 AS [Indian Civil]
1427-07-15 AH [Islamic (Fatimid)]
2006-07-28 AD [Julian]
2759-07-28 AUC [Julian (Imperial)]
1385-05-19 AP [Persian]
Note that the Islamic calendar transitions from one date to the next at sundown--and that for most (but not all) Muslims it is an observational calendar with no central observational authority, so that the date for one group may be one day different than for another.
I've noticed a trend of incidents around this date. Like the shootings in Seattle, a few years ago it was a child center in California, also Sudan bombings, the Sbarro pizza bombings in Jerusalem, etc. It really sticks out for me, not just because of the tragedies or near tragedies, but also because we have a few family birthdays around this date.
8.10 wasn't their date. My bet is that their date was 8.22 , as Iran's answer to the world.
Hmmmmmmm