Y2K was a crisis of near-Biblical proportions. Every retired COBOL programmer who could still see was drafted into solving it, once the first insurance policy management programs started blowing up trying to do arithmetic with two-digit date fields left over from the 1970s when computer input was limited to 80-column cards. Short-sighted managers kept putting it off for the next guy, until the next guy was them and we didn't have enough time to review trillions of lines of code. After doing triage we managed to remediate the red-blanket systems so nobody died or was simply stuck in an elevator at midnight, but plenty of yellow- and green-blanket systems were left for later, such as my bank's mortgage system, which thought that 2000 had 13 months, my power company's billing system, which couldn't print a bill until June, and the system that prints expiration dates on cases of diet cola, which were indeed expired. This kind of chaos was certainly enough to be the harbinger of a new millennium, arithmetic be damned.