In my street, the Christmas light decoration is gone too, sadly. But at least some people in my neighborhood still have some string lights and decorative stars etc. in their windows or outside their houses, so it's nice to look around on my way home from work when it's all dark outside.
As for me, I leave my little decorative lights (a red star in the living room, two red stars - but of a different design - in the kitchen, and a white snow crystal in my workroom) on the windows until the end of February, because winter is long and dark here, and I like lighting up the world a bit.