Ring in the Holidays at Theatre Square Plaza! Join Santa & Mrs. Claus as they Light Up The Square with their giant sparkling Christmas Tree in the middle of Theatre Square! The festivities will start with Santa’s Arrival, live music, laser show, and other festive performances. Bring your letter for Santa and drop it off at the Wishes For Santa Mailbox. Don’t miss the tree lighting at 7pm! This is a great photo opportunity and a festive starting point for the holidays in Downtown Petaluma. Friday, December 5, 6p-8p, Tree Lighting at 7p in Theatre Square Plaza, FREE!