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 prequel to the Disney Parks experience, General Leia Organa dispatches her top spy to Batuu in a desperate search for Resistance allies.