Union Street Live: Listen to live music on the Historic Courthouse Lawn in Concord the third Thursday of the every month from June through September in 2016, from 6 p.m. to 9 p.m. These are free concerts. The Historic Courthouse is at 65 Union St. South in downtown Concord. This year the events have been expanded and each is also a block party. There’s a second stage at Means Avenue.