MK --
Assuming you are using Project Server 2007, log into PWA with Administrator
permissions and then click Server Settings - Enterprise Calendars. Click
the New Calendar button and the system will launch Project Professional 2007
and open a new blank calendar for you to edit. In your situation, I would
recommend you create a 7x8 calendar that shows every day as a work day from
8:00 AM - 5:00 PM (or whatever default hours your people work). Click the
Work Weeks tab and then click the Details button to specify Saturday and
Sunday as working days, in addition to Monday through Friday. In addition
to using the calendar as a Task Calendar for Milestones that fall on a
weekend, your PMs could also apply this calendar as a Task Calendar on tasks
they need to "fast track" near the end of a project. Hope this helps.
"Week-end Work day Exceptions in EPM"