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Youth Philharmonic of Central Ohio, Spring Concert, 7:30 p.m. April 1 in the Fritsche Theatre at Cowan Hall on the campus of Otterbein University, 30 S. Grove St. in Westerville. The concert will feature selections from Les Miserables and Pirates of the Caribbean. Also on the program is a string piece written by one of the musicians with arrangements for winds by another musician. The concert is free and open to the public. For more information visit ypco.webs.com.
Delaware County Chapter of the American Red Cross, blood drive, 7 a.m. to noon April 6 at St. John Neumann Parish, 9633 E. state Route 37, Sunbury. To make an appointment visit redcrossblood.org.
Public Employees Retirees Inc., Delaware County Chapter, 1:30 p.m. April 1 at the Council for Older Adults, 800 Cheshire Road, Delaware. The program will focus on planning and growing. For more information contact John McDavid at 740-625-5979 or jormc@ embarqmail.com.
Six River Valley Chapter of the Archaeological Society of Ohio, 7 p.m. April 4 in Room 424 of Roush Hall at Otterbein University, northwest corner of Park and Grove streets in Westerville. Bill Pickard, assistant curator of archaeology at the Ohio Historical Society, will discuss "Musket Balls and Moose Tracks: Two Recent Archaeology Field Projects at the Ohio Historical Society." The program will highlight investigations at Fort Laurens, Ohio's only Revolutionary War fort, and the recovery of an Ice Age Stag-Moose near Medina. For more information visit ohiosrvc.org.