Calendar�s Group problems

I can�t establish an event for a period of time longer than 1 day in the group calendar. ie. Let�s say I want to establish from day 1 to day 7 as holidays, If I click in the start date, in the dialog box I can not change the end date (I can�t edit the field at all, wiich appears fixed with the same start date).

Additionaly, it�s quite confusing to work with date format MM/DD/YY in Europe could you add a general setup for the date formats (maybe customizable by each user)?

Finally I suggest you review the calendar and provide an easier and more powerful functionality. I believe it�s one of main the "weaknesess" of VO. I know it�s not easy anyway :-)