Spent the majority of 1998/9 re-coding retail systems to handle both Y2K and the introduction of the Euro. Good times. Thankfully the language the systems were developed in (Clipper) had the concept of an 'epoch' which told it how to interpret 2-digit years, so it was mostly a thing of re-setting the epoch, recompiling and testing... lots of testing.
Spent the majority of 1998/9 re-coding retail systems to handle both Y2K and the introduction of the Euro. Good times. Thankfully the language the systems were developed in (Clipper) had the concept of an 'epoch' which told it how to interpret 2-digit years, so it was mostly a thing of re-setting the epoch, recompiling and testing... lots of testing.