The birth time you state at 10:50 AM is what exactly? When the new Forum went live online? I'm surprised it took one hour and 25 minutes for the first post to be written.
I would think as with the start of a new business, the time when the first transaction (i.e. a customer sale) occurs can be used for the start time of the business.
Also please, why San Jose, CA? The original forum (as well as Tylnet) has a birth place of Noel's place of residence (Fountain Hills, AZ).