Either Sleeper or Logan's Run.
Today is Capricorn 2271...
Heh, I'd just added for that too.
Trivia bit, that movie had one of the most WTF-were-they-thinking complicated gun props in the actors' hands ever. The Sandman guns used an acetylene tank and jet with a glowplug and electric trigger release valve to produce their flame, and they had a problem with the gas leaking. The reason why the actors look so hesitant when firing them sometimes is that I'm sure they thought they just might blow up!