Alpha Phi Alpha, Xi Gamma Lambda Chapter, 29th Charter Day: 4 p.m., Faith Memorial Baptist Church, 28 Lands End Road, St. Helena Island; speaker will be the fraternity's 33rd national president Herman Mason Jr.; Donnie Campbell, 843-263-6393; Scott A. Gibbs, 843-812-6111
Volunteers to help build oyster habitat: noon-2 p.m., Hunting Island State Park at Russ Point Landing; volunteers should wear closed-toed shoes; 843-379-6583
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Greater Bluffton Republican Club meeting: 6:30 p.m., Pinecrest clubhouse; Bluffton Town Councilman Mike Raymond will speak; complimentary pizza provided; Gina, 843-247-1895 or email@example.com
National Alliance on Mental Illness Beaufort County's annual business meeting: 7 p.m., Christ Lutheran Church, 829 William Hilton Parkway, Hilton Head Island; 843-681-2200, www.NAMIBeaufortCounty.com
Magic Show for all ages by Tim Sonefelt: 2 p.m., Lobeco library, 1862 Trask Parkway; free; 843-255-5479