Chicks just don't know.
I pick a time that I want them to go to bed, and toss them into their coop, and lock them up.
If you are consistent with when you lock them up then usually after a week they figure out when they need to go to bed.
The old hens know when to go to bed every night, the long sunlight doesn't mess them up.
As to no sunlight in the winter.... then you do need a light on a timer so that they get enough time to eat.
Chickens are happy to sleep when it is light out (so in the summer) but they will not get off their roosts when it stays dark (in the winter).
I like giving them 10 hours of light as that is enough time for them to eat, but not so much light that they are forced to lay.
Also, when it starts getting cold (below 10F, definitely below 0 F) you want to feed them a high protein feed. 18 or 20 percent is good. I also give them salmon scraps, and any left over fat or oil. I mix the oils in with their pellets.