_Unit = _this select 0
_Vehicle = _this select 1
#Update
;check unit in the vehicle and speed of the vehicle. you could just use the speed part
? (_Unit in _Vehicle and speed _Vehicle > 88):goto "back"
~3
goto "Update"
#back
;skiptime minus 365 days
skiptime -8760
exit
-----
There, that's how many hours you'll need to skip to make it a full year (365 days, leap years not accounted for).
TheCaptain did some experimenting, and by using the Time and dayTime commands he was able to extract the full date and time of day. If you do some sort of hint, showing the dayTime in all it's glory, you could see if the game actually took you to -84 (or wherever you jump) or if it stays in -85.
Oh, idearz!!!
You could do a dialog interface, where the player could select how far back to jump. And then you'd calculate how far back it was in hours and skiptime there, and have preset eras.
Like, 1900 to 1925, WW1 time and units. 1935-1945 WW2 time and units and so on.
Dunno if that would work or not, with a bit of scripting (and the appropriate addons) I think it could work well.