Re-reading my original comment half a day later, I realize that it is wildly inaccurate. I do remember the Y2K mainframe changes part of the project being kind of chill. However, that is only in comparison to the rest of the project. We were redeveloping all the other mainframe systems (and building a few new ones) for a completely different platform and it had to be done ASAP because Y2K! Though it was ultimately successful, it was a classic death march. Good times.