Skynet Judgment Day as seen in the film Terminator 2:
The first specific date of Judgment Day as described by both Sarah Connor and the T-800 occurs on โAugust 29, 1997โฆ Skynet becomes self-aware at 02:14 am Eastern Time after its activation on August 4, 1997 and launches nuclear missiles at Russia to incite a counterattack against the humans who, in a panic, tried to disconnect it.
They are advanced war technology programmed wo human interaction.