Date - Display - Working days

Hi everyone...
  1. When i use the project management the date is displayed as  like "Month/Date/Year". Is there any solution to like this "Date/Month/Year".?
  2. when assigning activities with date to any Identities Aras Scheduler takes "Saturday and Sunday" as holiday. It is not suitable for every company. By default can i set "Sunday" as holiday?
  Thanks. Regards, SATHISHKUMAR C.