Looks like your locale reports the first day of week as sunday. This is common with american locales (maybe others, haven't tested).
The day shifting is a bug and has been fixed since (no release date is know). But still your week would be displayed with Sunday as the first day of the week in April.
Sometime ago I posted that April doesn't seem to work with newer versions of the TextEditor custom class for MUI. I just tried 15.18 (18-Aug-06). And, yes, I used the MOS version.
This isn't a serious problem, I'm only reporting it. And even with the new TextEditor the same problem exists: I'm unable to right-click access to the menu and transparency is disabled.
The only version of TextEditor that still works is 15.11
"if you ever slam anyone, for anything, somehow you always end up eating shoe"Targhan