Mayfest -- the downtown Tulsa celebration that's been a spring highlight in our community since the 1970s -- is scheduled this year for May 17th, 18th,and 19th. And as we learn on today's ST, big changes are planned. Our guest is the executive director of Mayfest , Heather Pingry, who tells us that the festival is moving to the Tulsa Arts District (which is located a bit further north of its original location). Pingry adds that this move will also help to fill the gap left by the closure of the