The 5:48 does not care what fell overnight, and neither do the people walking to it from the west side of Greenwich. Harter Landscaping of Port chester keeps that morning possible — plowing, opening driveways and parking aprons, shoveling walks, laying salt on the shaded pitch where boots slip. Winter arrives at this corner of Connecticut with the state line right there and the wind coming straight off the Sound, which makes drifting a genuine consideration. Clearing all the way to pavement, rather than to a polite margin, is the difference that shows at seven o'clock. The measure of a good night is that nobody had to think about the snow at all.