POTOMAC CELTIC FESTIVAL
Eight stages of continuous music and dance featuring popular Celtic acts including the Battlefield Band, Gradad, Ffynnon, Iona and Tinsmith. 10 a.m.-7:30 p.m. Saturday and 10 a.m.-6 p.m. Sunday, Morven Park International Equestrian Center, Tutt Lane, off Route 15 north of Leesburg. There will also be crafts, storytelling, poetry, children's activities, living history presentations, genealogy activities and historical information. $18; $9, ages 6-12; free, 5 and younger; $50, family (two adults and as many as four children). Saturday concert 7:30-11 p.m. $10. 800-752-6118 or www.pcfest.org.
Downtown Leesburg will be decked out in 1950s and '60s style from 6-10 p.m. Saturday. Five blocks will be closed to traffic for the annual car show of pre-1973 classics, antiques, street rods, customs and muscle cars. Stores and restaurants will be open late, and there will be live music and an outdoor sock hop. Visitors are encourage to wear period clothes. Rain date June 25. $3 suggested donation benefits the Loudoun Abused Women's Shelter. 703-779-4772.
For all ages, dusk-11 p.m. Saturday, C.M. Crockett Park, parking area near the front gate, 10066 Rogues Rd., Midland. Bring a telescope or use one provided by the Northern Virginia Astronomy Club. $6 at gate for nonresidents. 540-788-4867.