If you think Y2K might be a problem, consider this, found posted on the bulletin board of the MIS department at County Home Products in Vergennes, Vermont:

    Date: Sunday, January 24, 1999 7:24 AM
    Subject: Y-zero-K
    
    Message from: Rome
    Janus 6, 1 B.C.
    
    Dear Cassius,
    
    Are you still working on the Y zero K problem? This change from
    BC to AD is giving us a lot of headaches and we haven't much time
    left. I don't know how people will cope with the wrong way around.
    Having been working happily downwards forever, now we have to start
    thinking upwards. You would think that someone would have thought 
    of it earlier and not left it to us to sort out at the last minute.
    
    I spoke to Ceasar the other evening. He was livid that Julius hadn't
    done something about it when he was sorting out the calendar. He 
    said he could see why Brutus turned nasty. We called in the 
    consulting astrologers, but they simply said that continuing
    downwards using minus BC won't work. As usual, the consultants
    charged a fortune for doing nothing useful. As for myself, I just
    can't see the sand in an hourglass flowing upwards. We have heard
    that there are 3 wise guys in the east working on the problem,
    but unfortunately they won't arrive till it's all over. Some say
    the world will cease to exist at the moment of the transition.
    Anyway we are continuting to work on this blasted Y zero K problem
    and I will send you a parchment if anything further develops.
    
    Vale,
    
    Plutonius