The 12th annual “Tartan Day on Ellis Island” was rerouted this year to South Street Seaport, as the island is still closed to the public because of Hurricane Sandy. But the crowds that gathered at Pier 17 on March 30 were still in Highland spirits as they were entertained by pipers, jugglers and traditional dancers. Over 5,700 visitors attended the family-friendly programs produced by the Clan Currie Society, a Scottish heritage organization, with performances by the Rampant Lion Pipe Band, the New York Celtic Dancers and the NY Celtic Harp Orchestra. The fling’s not over yet — it merely kicks off Tartan Week NYC.