@lxo 2029 is when Reese and the Model 101 came back from; but that's years after Skynet took over (J-Day).
In the first movie J-Day was at least 2021 (Reese says that he served "under Perry, from '21 to '27"). I feel like there as an even earlier date given, but I'd have to re-watch the movie to be sure.
In the second movie, it's revealed that Reese told Sarah that J-Day is Aug 29th, 1997; but I don't think the first movie included that scene.
So we're already in the post-Skynet era :)