The Jewish Community Center of the North Shore will hold a reunion to mark its 100th anniversary on July 20, 21, and 22. Events include a reception at the JCC, a dinner and party at a Saugus restaurant, and a Sunday brunch at the JCC. The JCC originally opened in Lynn, and moved to a new building in Marblehead in 1972. To attend, contact Joan Lawrence at 781-631-8330 or jccreunion@jccns.com.