I hadn't thought about it until now, but I have been eating later as it has begun to stay light later at night. It isn't a problem for me, since I have no set eating times. I was usually anxious to start cooking/eating as soon as I got home during the dark winter months (about 6pm) and lately I've been eating around 8pm and perfectly happy with it.
This is really interesting, and something I never thought about! I'm glad you brought it up.
Maybe you could eat your dessert later, around the time it gets dark, not right after dinner... then you'd still get that "end of the day" signal. This is assuming you don't subscribe to that "I must not eat after X:00pm" idea. I'll withhold my opinions on that theory, there have been enough other threads about it.