My theory is that your clock battery has died, and the clock is using main battery power. Or that your clock thinks that, but the clock battey is just fine (which would explain why your clock still keeps time, it's forced to use the clock battery.)
Hello! My name is Mr. Beam. I am a homebrew game developer. I came up with a name for myself:"Cucumber Moon" ( know it's silly. Alternate title is K Games) If I recieve a Pandora, my slogan will be this: "Developing games in the car since 2010(?)"