From a Greenfield Department of Public Works press release:
Winter parking ban is in effect from 12:00 midnight Monday 3/18/13 through 2:00 pm Tuesday 3/19/13 on all residential streets.
Winter parking ban is in effect for the Downtown Business District and parking lots from 12:00 midnight Tuesday 3/19/13 to 7:00 am Wednesday 3/20/13.