I did a contract in the run-up to Y2K to help with some code that used two-digit year fields. In their defence, it was originally written in Fortran II sometime

I did a contract in the run-up to Y2K to help with some code that used two-digit year fields. In their defence, it was originally written in Fortran II sometime in the early 60s, and I think they can be forgiven for not thinking it might still be in use nearly 40 years later!