the attack was carried out on June 7th at 6:15 p.m. Baghdad time, which would make it about 10:15 p.m. eastern time here on June 6th. So maybe you are right in pointing out that the 666 may have been dead on!
The article also says that President Bush was notified at approximately 4:35 p.m. Washington time yesterday.
It would be 10:15 AM EDST not PM.