Datepicker lacks local strings for month and day names.

to reproduce bug:
1. switch to any language but english.
2. add an assignment to a course
3. click on due: to trigger the datepicker

I guess the definition in the file \moodle\lib\form\yui\dateselector\dateselector.js on line 196 must be changed.

for my german installation I did

this.calendar = new YAHOO.widget.Calendar(document.getElementById('dateselector-calendar-content'),

{ iframe: false, hide_blank_weeks: true, start_weekday: config.firstdayofweek }

);

chnage to (see: http://developer.yahoo.com/yui/examples/calendar/germany.html)

this.calendar = new YAHOO.widget.Calendar(document.getElementById('dateselector-calendar-content'),

{ MONTHS_SHORT: ["Jan", "Feb", "M\u00E4r", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"], MONTHS_LONG: ["J\u00E4nner", "Februar", "M\u00E4rz", "April", "Mai", "Juni", "Juli", "August", "September", "Oktober", "November", "Dezember"], WEEKDAYS_1CHAR: ["S", "M", "D", "M", "D", "F", "S"], WEEKDAYS_SHORT: ["So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"], WEEKDAYS_MEDIUM:["Son", "Mon", "Die", "Mit", "Don", "Fre", "Sam"], WEEKDAYS_LONG: ["Sonntag", "Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag", "Samstag"], iframe: false, hide_blank_weeks: true, start_weekday: config.firstdayofweek }

);

and it works fine...

Instead of my hardcoded string the bugfix should use strings from the moodle calendar should be injected.