BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
In this final chapter of the POE DAMERON series, we see what may be BLACK SQUADRON'S last mission, as they desperately attempt to find allies for GENERAL LEIA ORGANA'S decimated RESISTANCE. It’s been one heck of a ride, but all stories must come to an end.