9:58 a.m. Anne Arundel County officials will conduct a ceremony at the county 9/11 Memorial at county fire and police headquarters in Millersville.
10 a.m. Gov. Martin O'Malley will kick off the 2013 Day to Serve at a rally at Baltimore Community ToolBank on Wicomico Street, marking Sept. 11 as the National Day of Service and Remembrance.
10 a.m.-6 p.m. Though not a special event, the 9/11 Maryland Memorial Exhibit is displayed at Top of the World Observation Level at the World Trade Center at the Inner Harbor. The display shows information on Maryland victims of the Sept. 11 attacks.
11 a.m.-2 p.m. Towson University will host the September 11th Operation Patriot Challenge at Burdick Field. Ceremonies, followed by a food and activities.
4 to 6 p.m. Firefighters, residents and Harford County Dels. Pat McDonough and Rick Impallaria will conduct a flag-waving event at the Route 152 overpass at I-95 in Joppa. Parking at the park-and-ride lot on Mountain Road.