The following shows the <Calendar> element structure for Microsoft Office Project 2003.
<Project>
				      . . .
				   <Calendars>
				      <Calendar>
				         <UID/>
				         <Name/>
				         <IsBaseCalendar/>
				         <BaseCalendarUID/>
				         <WeekDays>
				            <WeekDay>
				               <DayType/>
				               <DayWorking/>
				               <TimePeriod>
				                  <FromDate/>
				                  <ToDate/>
				               </TimePeriod>
				               <WorkingTimes>
				                  <WorkingTime/>
				                     <FromTime/>
				                     <ToTime/>
				                  </WorkingTime>
				               </WorkingTimes>
				            </WeekDay>
				         </WeekDays>
				      </Calendar>
				   </Calendars>
				      . . .
</Project>