Funny thing, have been fighting with calendars recently at two fronts: google calendar and ubuntu. For Ubuntu, I’d like the week to start on Monday. Weeks start on Monday, you know? They just do. It is not called “weekend” for nothing…
Anyway, see here on instructions how to fix. Short short version: change your locale files (/usr/share/i18n/locale/$LOCALE) to say first_weekday 2, rebuild the locales (sudo locale-gen) and restart gnome-panel (killall gnome-panel).
The google thing was slightly different. We have a calendar for seminars at work. We do not have seminars in the weekend, but we do have them on Monday. Mornings. So in the weekend, it’d be nice if our embedded Google Calendar would show the next week’s calendar. Gives you a head start. Well, so far it seems the easiest way to do that is to tell Google it’s next week :s.
Will think about this one more too.