Now, _that_ was a nasty little math bug. Well, I now have a fix, and if you need it, the code can be gotten here:
https://github.com/jmdavis/phobos/tree/datetime
I'm revamping std.datetime's unit tests at the moment, and I probably won't create a pull request until that's done. Also, with these changes, the unit tests currently fail on Windows due to bug# 5781, so that's going to need to be fixed before a pull request is made. However, the changes are posted in the datetime branch of my github repository if you need them before they actually get merged into Phobos proper.
Comment #2 by dlang-bugzilla — 2011-03-24T13:19:59Z
Thanks, the fix worked :) Feel free to close the issue when the fix is in.