Answer: 29.08.1997
August 29th, 1997 is the date upon which the nuclear fire will hit the USA. August 4th, 1997 is the date when the 'Skynet' system goes on-line. February 28th, 1985 is John Connor's date of birth, and I made the August 29th, 2029 date up, although the Future War scenes are based on the year 2029 in this film, the same year that the Terminator and the T-1000 are sent back through time.