Blue Angels air show: 2-3 p.m. today and Sunday, Charleston Harbor. Free.

Family Circle Cup: 1-3 p.m. today and Sunday, "Game, Set, Rock" exhibition, 7 tonight, tennis center, 161 Seven Farms Drive, Daniel Island. Tickets $15-$35.

Lowcountry Strawberry Festival: 10 a.m.-6 p.m. today, noon-6 p.m. Sunday, Boone Hall Plantation, U.S. Highway 17, Mount Pleasant. $5 adults, $3 children. For more information, go to www.boonehallplantation.com.

East Coast Canoe and Kayak Festival: All day today and Sunday, James Island County Park, 871 Riverland Drive. $1 per person park admission. Charges for some festival events. For more information, go to www.ccprc.com.

Battle of Charleston: 9 a.m.-10 p.m. today, 9 a.m.-4 p.m. Sunday, Legare Farms, Jenkins Farm Road, Johns Island. Adults, $10, children, $5. For more information, www.battleofchas.com.

James Island Scouting Centennial Celebration: 9 a.m.-6 p.m. today, McLeod Plantation, 325 Country Club Drive, James Island. $7 donation.

World Grits Festival: 7 a.m.-6 p.m. today, noon-5 p.m. Sunday. Free. Highway 15, St. George. For more information, go to www.worldgritsfestival.com.

Charleston County 2010 Earth Day Festival: 11 a.m.- 3 p.m. today, Park Circle, North Charleston. Free. For more information, go to www.charlestoncounty.org/news.

Loggerhead turtle release: 4:30 p.m., beach in front of Isle of Palms County Park, 1 14th Ave. Free. For more information, go to www.scaquarium.org.