(Greenfield, MA) It’s Election Day in Greenfield. Polls will be open from 7 a.m. to 8 p.m. at Greenfield High School. This election will determine the city’s Mayor, City Councilor at Large and for precincts 1, 2, 3 and 4; Town Assessor, and 3 School Committee seats. For mail-in and absentee voters, ballots must make it to city clerk’s office by the close of polls to be counted.