https://bugs.winehq.org/show_bug.cgi?id=51758
--- Comment #2 from Esme Povirk madewokherd@gmail.com --- Created attachment 70658 --> https://bugs.winehq.org/attachment.cgi?id=70658 test case
I added a test to do a more thorough validation, forcing .NET to load all timezone information: https://github.com/madewokherd/wine-mono/commit/1364f4bee49613401dbaf98cad28...
For convenience, here it is in exe form.