When using the Data&Time plugin for the panel, setting "Week day starts on Monday" in the Preferences has no effect. On the displayed calender the week always starts on sunday. Reproducible: Always Steps to Reproduce: 1. Set "Week day starts on Monday" in the Date&Time panel plugin preferences Actual Results: On the displayed calender the week always starts on sunday. Expected Results: On the displayed calender the week should have started on monday. Installed: Xfce 4.2.3.2 (installer) Xfce-Goodies 4.2.1 (installer)
I'm fairly certain that this is because newer Gtk version take this value from the locale settings and don't allow the developer to set it manually.
I confirmed it on the web gtk+2 manual. Then, I think that it is more reasonable to remove this option "Week day starts on Monday". If there is no objection, I will close this bug and remove this option.
in 4.4 datetime does not exist and new orage-clock plugin does not havethis feature since it realy comes from the locale