A big part of riding outside in the Winter happens to be nocturnal. Riding bikes at night is a ridiculous amount of fun. Granted, you need to have decent lighting. A simple handlebar and helmet light will do the trick. In my experience, around 300-400 lumens is ideal where having more, seems to be too sharp and make funny shadows. While I have not crunched the Strava mileage, I am pretty sure that I have logged more night miles than day miles at Merrell Trail in Rockford.