"Computer programmers quickly claimed that the 150 figure was not evidence of fraud, but rather the result of a weird quirk of the Social Security Administration’s benefits system, which was largely written in COBOL, a 60-year-old programming language that undergirds SSA’s databases as well as systems from many other US government agencies . . .
. . . Because COBOL does not have a date type, some implementations rely instead on a system whereby all dates are coded to a reference point. The most commonly used is May 20, 1875, as this was the date of an international standards-setting conference held in Paris, known as the “Convention du Mètre.”"