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.
AS THE PAST DIES, THE FUTURE BECKONS…REY gambles everything as she heads for a confrontation with KYLO REN and SUPREME LEADER SNOKE. As the fate of the RESISTANCE hangs in the balance, will POE DAMERON risk mutiny to take matters into his own hands? And who is the mysterious visitor coming to offer counsel to LUKE SKYWALKER? (SPOILER ALERT, it's YODA!)