In case you hadn't already found it,
here are the articles that describe the timeline we go by.
tl;dr the current year is 900 ABY (that is, 900 years
After the
Battle of Yavin, which was the ending of
Star Wars Episode IV: A New Hope). There was a galactic-wide plague (the Gulag Plague) that caused all planetary travel to cease. This lasted for 400 years. Beginning 65 years ago (835 ABY), interplanetary travel resumed and new political powers (our major factions) began to take shape.
Time is very fluid here. Staff update the timeline when there's significant enough events to warrant it, but you may find some people saying its 900 ABY and others saying its 905 ABY, etc. In general, don't overthink it and do whatever makes sense for your character.