In Summer I tend to have more carbs and proteins, along with bigger meals for both lunch and dinner since I tend to exercise later outside then during Winter. The extra amounts in both for energy allow me to be active longer before the sun goes down.
In the Winter, I tend to reduce carbs and front load my day with them, so that in effect, by the time the sun goes down, my body is running down on their energy stores for the day. I also tend to reduce proteins and only increase them if I have a heavy day for example if I have both weight training and some higher impact cardio like hockey or indoor rock climbing or snowboarding.
In Winter I tend to have a bigger lunch and smaller dinner which helps to focus in the reduction in energy. Generally by the time 7 or 8pm rolls around, I can feel my body starting to tune down for the day and signals my body is getting ready for sleep. A hot shower usually puts me over the edge. I can get into bed and I'm out cold in a few minutes.
Hope this helps.