Earth Day, celebrated annually since the first one in 1970, has become a global event of rededication to protection and preservation of our planet’s environment.

Several events will herald Earth Day in the East Bay Regional Parks. One is at Coyote Hills Regional Park in Fremont, where “Reduce, Reuse and Recycle” is the theme of a program from 9:30 a.m. to noon and 1:30 to 4 p.m. on Saturday, April 20, led by naturalist Dino Labiste.

Lots of family fun is planned, including creating your own litter bug, viewing environmental puppet shows at 11:40 a.m. and 3:40 p.m., and playing recycling games.

Coyote Hills is at the end of Patterson Ranch Road off Paseo Padre Parkway. The Earth Day-themed activities are free of charge; there’s a parking fee of $5 per vehicle. For information, call 510-544-3220.

Another Earth Day event is planned on Saturday, April 20 at Washington Park next to Crown Beach in Alameda, sponsored by the city and park district.

Before the main event, Crab Cove Visitor Center will have a beach and pond cleanup session from 8:30 to 10 a.m. Students can earn community service hours by participating.

Crab Cove is at the end of McKay Avenue off Central Avenue. Advance registration is required for the cleanup. Call 888-327-2757, select option 2, and refer to program number 24320.

Then from 10 a.m. to 3 p.m. there will be all kinds of Earth Day-related activities and free give-aways at Washington Park next door to Crab Cove and Crown Beach. For information on either event, call 510-544-3187.

Earth Day is also on the agenda at Tilden Nature Area near Berkeley. “The Earth is our Home” is the theme of a program from 2 to 3 p.m. on Sunday, April 21 with interpretive student aide Brianna Contaxis-Tucker. Make your own carbon footprint, learn the history of heroes who helped the earth, and gain tips for saving water, resources and energy.