At least I know the pattern. A problem without solution is already solved: I just pick up a good book and wait it out, knowing I'll be sleepy the next day.
Worked 6am to 2pm at my day job. Came home, ate dinner (late lunch) took a 2 hour nap. Went to Starbucks and worked for 3 hours on my side business and had 2 grande coffees - got home around 9pm and couldn't fell asleep until midnight - one of those sleeps where your not really sure if you actually feel asleep.
Coffee, especially strong coffee, can destroy you late at night.