Microsoft Project uses a calendar, called the base calendar, to define the default working and nonworking days used for scheduling tasks in projects. Three base calendars are built in to Microsoft Project:
Standard— The 5-day, 40-hour week, with work from 8:00 a.m. to 5:00 p.m. that’s standard in the United States.
Hour— A round-the-clock operation from 12:00 a.m. to 12:00 a.m.
Night Shift— An example of a calendar for those whose work shift starts toward the end of one day and ends in the morning of the next day.
All projects are assigned to a base calendar, and the default assignment is to the Standard base calendar. You can edit the Standard calendar, use one of the other built-in calendars, or create ...