It's Sunday, Earth Day. Happy birthday to actor Jack Nicholson (1937), an L.A. Lakers fan who knows his way around Timberline Lodge. Today in 1922, the Northwestern Electric Co. said it had increased its hydropower output by about 20,000 kilowatts for Northwest clients. Expect a mostly sunny day, with a high in the mid 60s. Spend Earth Day helping others in need:

• Head to the Oregon Zoo for a day of Earth Day events and workshops, 9:30 a.m. to 3 p.m., 4001 S.W. Canyon Road. www.oregonzoo.org

• Travel west to Oswald West State Park south of Cannon Beach to help Surfrider PDX clean up the beach for Earth Day, beginning at 10 a.m. www.surfrider.org/chapters/entry/portland-oregon

• Join the Meals on Wheels People for Stride for Seniors Charity Walk, 10 a.m. to 1 p.m., Portland International Raceway, 1940 N. Victory Blvd. www.strideforseniors.org

• Head to the Webfooters Post Card Club for the 38th annual Antique Paper Show and Sale, 10 a.m. to 4 p.m., Portland Meadows Turf Club, 1001 N. Schmeer Road. www.thewebfooters.com/

• Find something tasty at the Northwest Food Show, 10 a.m. to 5 p.m., Portland Expo Center, 2060 N. Marine Drive. www.nwfoodshow.com/