Midnight. Y2K. Daylight Savings Time change. Leap Day. Congress changes when Daylight Savings Time happens and one component in the system didn't know about it. Year 2038 problem.
Mayor: What do you mean, "biblical"?
Dr Ray Stantz: What he means is Old Testament, Mr. Mayor, real wrath of God type stuff.
Dr. Peter Venkman: Exactly.
Dr Ray Stantz: Fire and brimstone coming down from the skies! Rivers and seas boiling!
Dr. Egon Spengler: Forty years of darkness! Earthquakes, volcanoes...
Winston Zeddemore: The dead rising from the grave!
Dr. Peter Venkman: Human sacrifice, dogs and cats living together... mass hysteria!
Mayor: All right, all right! I get the point!