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.
Blast into hyperspace and relive Luke Skywalker's exciting adventure as he goes from being a farm boy on the dusty desert planet of Tatooine to the rebel pilot and hero who destroys the Empire's most powerful weapon--the Death Star!
Star Wars: The Rise of a Hero reunites legendary Star Wars comic book creators Louise Simonsson, Walter Simonsson, and Tom Palmer, along with Laura Martin, they deliver an all-new, action-packed retelling of A New Hope just in time to celebrate the fortieth anniversary of that landmark science fantasy epic.
May the Force be with you!.