Step back in time this season in the family-friendly Holidays on the Northern Frontier, an event that features special performances and activities happening throughout Sonoma’s historic downtown. The Mission Chapel is holding several sing-along programs of music. The Sonoma Barracks presents a living history exhibit, “A Soldier’s Christmas,” with crafts and refreshments. Pickle Creek String Band plays in the Toscano Hotel and the Blue Wing Inn hosts a Yuletide shindig on Saturday, Dec. 8. East Spain Street, Sonoma. 4pm to 8pm. Mission Chapel sing-along is ticketed; all other events are free and open to public. 707.938.9560.