2018 Open House and Greens Show "Winter Wonderland" - Guilderland Garden Club and Guilderland Historical Society are preparing for the annual festivities at the Mynderse-Frederick House at 451 Main Street, Route 146 West in Guilderland Center. The event is scheduled for Friday, November 30 from 4 - 8 PM, and Saturday and Sunday, December 1 and 2, from 1 – 5 PM. The theme this year is “Winter Wonderland.”