I'm trying to decide when to start out my campaign (it's sort of a Spelljamming/Planescape campaign, so it includes other settings). I'm not sure which year is the best starting year to use.

Which year was the "current" year in the original boxed set? How far did the supplements advance the timeline? Were there any auspicious astronomical events in recent years? What suggestions would you personally give for a fun date to start on?