Andor's narrative revolves around a few specific years of the Star Wars timeline. So, how do we know when it takes place? What does BBY mean?

"Andor" Season 2 finally reveals how Cassian and K-2SO met before "Rogue One" and, in the process, changes "Star Wars" forever.

This power first appeared in the 1994 novel The Courtship of Princess Leia, and was later used by Jedi like Luke Skywalker, Mace Windu, Qui-Gon Jinn, and Obi-Wan Kenobi. But we’ve never seen it in the modern canon. The last time it was shown at all was in a 2005 Clone Wars episode, so it’s never been a core component of the Jedi repertoire.