Should you cut grass shorter for winter?

Yes, you can cut your lawn anytime you want, winter (of course, most people don't have to in the winter), spring, summer and fall. Grass is not affected by frost or freezing. In the winter, it basically goes to sleep (in the northeast). The only problem grass has is if in the winter, there is not enough snow cover, the ground freezes real deep and roots of the grass can be damaged. But mowing and then having a frost is absolutely no problem. Actually, here is a hint--it is more dangerous to mow your lawn in the middle of the hot august dogdays than it is before a freeze. Lawns in the summer should be kept mowed to highest possible height to protect the soil and the tender roots of the grass.