September 1st, 2010 - The one year anniversary of Alison’s disappearance (101).
September 2010 - Aria returns to Rosewood after her family spent the past year in Iceland. Upon her return, the Liars begin to bond again, and Mona fears she will lose Hanna. This fear ultimately catapults Mona back into her "Original A" ways. She thinks that if the gang gets back together, then she will become a loser again (101).
September 2010 - Before school begins, Aria meets Ezra at the Hollis bar & Grille (101).
September 2010 - Maya St. Germain moves into the DiLaurentis house (101).