I'm looking for a short story about the end of the world, perhaps even the end of the universe. The story follows the mundane nighttime routine of, if I recall correctly, a couple. They put the kids to bed, do the dishes, put on the radio, and wait for the end of the world. There might be something up going upstairs, a candle burning, or a door closing?
"Last Night of the World" by Ray Bradbury
Since Phlegmatic-Farmhand hasn't written an answer despite finding one, I will. :-)
I immediately recognized the story as "Last Night of the World" by Ray Bradbury. originally published in Esquire magazine, February 1951, subsequently included in the collection The Illustrated Man. It can be read online here.