LogFAQs > #931540539

A lot of scheduled processes, let's say "Update GPS system", in computing require that the date meet a certain requirement. If a program were poorly designed and only utilized a two digit field for the year, the the date value might be less than the value needed to prompt the process. This was an actual known issue in the decade leading up to the new millenium, though, and basically every critical computer service in the world that might be vulnerable to this pseudo-"overflow" was updated well im advanced of the New Year. You can find some evidence of things like high end vending machines in Japan though that were not fixed and caused them to crash for a few days.