Nick and Christina will "flip the switch" to light up the Monument in Baltimore's Mount Vernon neighborhood and officially kick off the holiday season. Pre-event festivities will begin at 5:30 p.m., with the lighting ceremony scheduled for 7:00 p.m. The evening will also feature refreshments, roving entertainers and fireworks. Following the Markakis' holiday helping, Rick Dempsey will participate in the Fells Point Old Tyme Christmas celebration this Saturday, December 5. Like Nick and Christina, Rick will have the honor of lighting the Great Tree in Broadway Square. The event in Fells Point lasts all day, with a visit from Santa, horse drawn sleigh rides, a parade of lighted boats and live music; Dempsey will light up the tree around 5:15 p.m. So if you're missing the O's and ready to start celebrating the holiday season, head out to one or both of these local lighting festivals with a few of your favorite Orioles. Go O's and Happy Holidays, O's fans!