The ninth annual St. Piran’s Day event will again take place in downtown Grass Valley to celebrate the area’s Cornish history and remember St. Piran, the patron saint of Cornish miners. “It’s a way for us to acknowledge the Cornish heritage of the community and to just kind of celebrate and be silly and have fun,” said Eleanor Kenitzer, the event founder. The festivities will begin 10 a.m. Saturday in the Grass Valley City Hall parking lot at Main and South Auburn streets. The town crier, Robert Russell, will make a proclamation and the Grass Valley Male Voice Choir will …