Photos from 1983: Doomsday

Technically, Doomsday occurred on September 25, 1983 in the United States.

I should also note that according to the North Star Republic article on the alt history wiki, Charles Schulz actually survived Doomsday. He was able to evacuate to Rochester with his family and a large selection of Peanuts comics. In 1986, after the government in Rochester was overthrown he moved into Mankato where he began to write more Peanuts comics for the then-state-run Mankato Times, though of course the Peanuts comics wouldn't be run nationwide anymore for obvious reasons. He would die in 1997 due to cancer (three years before his OTL death), but the Peanuts have been reprinted as reruns in the Mankato Times ever since.
That's pretty interesting, maybe you could update the North Star Republic page to change up the text so that every mention of "the peanuts" is instead "Peanuts".

Prescott National Guard Armory, built in 1925, and one of the bases of the Prescott Infantry sections. Prescoot is the only country in former Arizona not under Navajo control