A quick chart:

    Eastern – 1 PM
    Central – 12 PM
    Mountain – 11 AM
    Pacific - 10 AM
    London – 6 PM
    Moscow – 9 PM
    New Dehli – 10:30 PM
    Shanghai – 1 AM Thursday
    Tokyo – 2 AM Thursday
    Melbourne – 3 AM Thursday
    Auckland – 5 AM Thursday

Stolen from: http://www.gottabemobile.com/2013/09/17/ios-7-release-time-e...