The Danbury Railway Museum will celebrate Railway Post Office Dog Day on July 11, honoring Owney, the famous Railway Mail Service mascot. Visitors can receive a special one-day U.S. Postal Service pictorial postmark, ride vintage trains, tour a restored Railway Post Office car, and enjoy family activities. The event runs from 10 a.m. to 4 p.m. at the museum on White Street in Danbury.