1. Are you running an hour late today? Daylight Saving Time began Sunday at 2 a.m., when clocks should have been set forward an hour. It’s a good reminder to replace batteries in smoke and carbon monoxide detectors, too.

2. A monthly program by the Council on Aging is being held from 1:30 to 3:30 p.m. today at Cary Memorial Library. Today’s topic, presented by Dan Leclerc, is: “World War I: The Final Year of Conflict and the Devastating Impact of the Great War on the European Civilization.”

3. Lexington Community Education is holding a talk, “Facebook for Profits,” at Cary Memorial Library from 6 to 8:30 p.m. Visit LCE’s website for more information. And, “like” Lexington Patch on Facebook.

4. The Rotary Club of Lexington meets today at 12:15 p.m. at Waxy O’Connors.

5. Today’s public meetings include the Board of Selectmen with Planning Board, Council for the Arts, School Committee, Shade Street Traffic Meeting, Tourism Committee, Economic Development Advisory Committee, Appropriation Committee. See the agendas here.