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For its 22nd edition, the Washington Annual Irish Folk Festival has expanded to two days and moved to a new location, the Montgomery County Fairgrounds in Gaithersburg. There will be live music on five stages along with several new features: an “Irish Dance Hall” with all-day dancing and dance workshops; “Ireland Over Here,” a program of readings by eight Irish-American writers; and “Down on the Farm” which includes demonstrations of herding by sheep dogs and Irish draught horse jumping. But it’s still the music that draws most folks to this annual celebration of traditional Irish culture. This year’s lineup hews more closely to the Irish and Irish-American mainstream. Heading up the list of performers are Donegal superstars Altan with their unique double fiddle front line and Solas, the New York-based sextet whose instrumental wizardry and smooth style recall the legendary Bothy Band. Also part of the plethora of talented performers will be the fine new band led by accordionist John Whelan, which includes the gifted multi-instrumentalist Robin Bullock, who handles all sorts of stringed instruments expertly; Washington’s own Celtic Thunder; young Irish group Beginish; Craobh Rua; the Green Fields of America; and many more. The jigs ‘n’ reels run from 10 a.m.-10 p.m. Saturday, Sept. 5, and 10 a.m.-8 p.m. Sunday, Sept. 6, at the Montgomery County Fairgrounds, 16 Chestnut St., Gaithersburg. $15. (301) 565-0654. (Ken Roseman)