What would have been John Lennon’s 81st birthday will be celebrated with the Dear John Concert at 3 p.m. Saturday, Oct. 9.

Appearing this year are Peter Frampton, Yola, Earl Sick, Matt Sorum, Matt Lucas, actor Martin Freeman, fashion Designer Pam Hogg and others. BBC personality Bob Harris will host, with proceeds going to War Child for its continuing efforts to help young people in areas of conflict.