Category Events - United States, Olney (MD) Rock the Fountain Family Concert featuring The Retro-Rockets. http://www.retro-rockets.net/ Join us for music and fun near the fountain! Rock the Fountain Family Concerts will be held every Thursday @ 6pm in June, July & August. Rock the Fountain Kids' Concerts will be held every Tuesday @ 10:30am in May, June & July. *Schedule subject to change without notice. Weather cancellations will be posted on the Fair Hill Facebook page.