Use Code BALT69 for a $69 Ticket to One Day University on July 9

U.S. Geological Survey

Datebook

Sunday, Sept. 14

Concert Rams Head Promotions presents R&B vocalist Jeffrey Osborne at 8 p.m. at the Chesapeake Arts Center, 194 Hammonds Lane in Brooklyn Park. Tickets: 410-268-4545, 410-244-1131 or ramsheadonstage.com.

Music by the bay The Bayside Summer Concert Series features music by the Annapolis Bluegrass Coalition from 4:30 p.m. to 6:30 p.m. at Downs Park, 8311 John Downs Loop, Pasadena. No bikes, skateboards or roller skates are permitted in the concert area. Information: 410-222-6230 or go to aacounty.org/RecParks/concerts.cfm.

Monday, Sept. 15

Mario tourney A Mario Kart Tournament for teens will be held at...