Weston: As part of Japanese Culture Day, educator Willamarie Moore will discuss her two children’s books set in Japan and lead hands-on activities with audience members, Japanese refreshments will be served, and an exhibition of Japanese stamps will be on display tomorrow, 10:30 a.m. to noon, at the Spellman Museum of Stamps and Postal History, on the Regis College campus, 235 Wellesley St. $8; $5 seniors; $3 children. 781-768-8367, www.spellman.org.
Needham: In “Living Deliberately: Thinking Like Thoreau Today,’’ Jeffrey Cramer, curator of collections at the Thoreau Institute at Walden Woods and author of the award-winning “Walden: A Fully Annotated Edition,’’ relates the Concord transcendentalist’s writings to our times Sunday, 2 p.m., at Needham Free Public Library, 1139 Highland Ave. Free. www.needhamlibrary.org.
Newton: The Heritage Chorale opens its 75th anniversary season with a performance of Mendelssohn’s “Hymn of Praise,’’ also known as his Symphony No. 2 in B-flat, in collaboration with the Boston College Symphony Orchestra at 2:30 p.m. Sunday in BC’s Trinity Chapel, 885 Centre St. $20; $15 students, seniors. www.heritagechorale.org.
Event organizers: Submit items directly to boston.com/addevents.