Ok, VALVe's timezone is -8GMT or Pacific Time. They're located in the State Of Washington.
Here are the timezones w/ the provided release time:
* -12GMT || 8:00PM (Nov 15th)
* -11GMT || 9:00PM (Nov 15th)
* -10GMT || 10:00PM (Nov 15th)
* -9GMT || 11:00PM (Nov 15th)
* -8GMT || 12:00AM (Nov 16th) (VALVe's Time)
* -7GMT || 1:00AM (Nov 16th)
* -6GMT || 2:00AM (Nov 16th)
* -5GMT || 3:00AM (Nov 16th)
* -4GMT || 4:00AM (Nov 16th)
* -3GMT || 5:00AM (Nov 16th)
* -2GMT || 6:00AM (Nov 16th)
* -1GMT || 7:00AM (Nov 16th)
* GMT || 8:00AM (Nov 16th)
* +1GMT || 9:00AM (Nov 16th)
* +2GMT || 10:00AM (Nov 16th)
* +3GMT || 11:00AM (Nov 16th)
* +4GMT || 12:00PM (Nov 16th)
* +5GMT || 1:00PM (Nov 16th)
* +6GMT || 2:00PM (Nov 16th)
* +7GMT || 3:00PM (Nov 16th)
* +8GMT || 4:00PM (Nov 16th)
* +9GMT || 5:00PM (Nov 16th)
* +10GMT || 6:00PM (Nov 16th)
* +11GMT || 7:00PM (Nov 16th)
* +12GMT || 8:00PM (Nov 16th)
*Note DayLight Savings: For those South of the Equator - your GMT time will be an hour ahead. So if your GMT Zone is listed 6 on here, then it will be released and hour ahead or 7 in this example.