Chris, "as of" means the day or time something begins or ends. The contract takes effect as of midnight, June 11. The hockey seasons ends as of March 1. The prison term begins as of the day the defendant was arrested. As of December 7, 2008 Chad is driving the Ferrari.

From, at, or until a given time. For example, As of five o'clock the store will be closed for inventory, or As of last December our meetings have been open to the public, or As of now I'm not sure how I'll vote. This idiom was first used in business but came into more general use