Systems support pilot fish starts getting reports that a special Y2K tool has stopped working — in early 2008.

“To prepare for Y2K, our company bought this commercial product to do all Y2K century-digits correction and set up all applications to use that software,” says fish.

“It stopped working correctly all of a sudden, early in 2008. I was told to find a fix for it immediately.”

Fish examines the original installation of the date-fixing software, circa 1997, and quickly finds the problem. The software uses a “century window” approach, so that every date after a specific two-digit year is assumed to be in the 1900s, while every date earlier is in the 2000s.

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