Edit a project calendar

Choose Enterprise, Calendars, then choose Project.
Select the calendar you want to edit and click Modify.
To base the calendar on another calendar, select a new global calendar in the Inherit Holidays and Exceptions from Global Calendar field.
Choose the month you want to modify by clicking the appropriate arrow button next to the month-year title.
To add a nonworkday, click the date you want to make a nonworkday, then click Nonwork.
To change the number of hours in a specific workday, click the date you want to change.

Choose Total work hours/day to define the total working hours in each day. In the Work hours/day section, set the amount of hours available to work for a specific day.

Choose Detailed work hours/day to define which hours of the day are work or nonwork hours. In the Work hours section, select the hours you want to change and click Work or Nonwork.

If the date's display color changes to white, the number of hours you entered does not equal the default number of working hours for that weekday.
To make an exception into a workday and apply the default number of working hours to that day, click the exception you want to change, then click Standard.
To define the calendar's default hours per timeperiod, click Time Periods. For each timeperiod, enter the default number of hours.

For activities to which the calendar is assigned, these values are used as conversion factors when users enter or display units and durations in time increments other than hours.

Tips

To apply the same change to all instances of a specific weekday in the displayed month, click the weekday's column label.
To view a calendar's assignments, in the Calendars Dialog Box, select the calendar, then click Used By.
When an assignment to an activity has manual future period values, editing the project calendar for the associated activity may cause the manual values to change.
The program calculates and stores time unit values in hourly increments, but users can set preferences to display time units in other increments, such as days or weeks. When you define the Hours per Time Period for a calendar, these values are used to accurately convert units and durations to the selected display format for activities to which the calendar is assigned.
When connected to a P6 Professional database: Fields in this dialog box are disabled if the "Use assigned calendar to specify the number of work hours for each time period" checkbox on the Admin Preferences, Time Periods tab, is not marked. If this checkbox is not marked, default hours per time period settings are defined on the Admin Preferences, Time Periods tab.
When connected to a P6 EPPM database: Fields in this dialog box are disabled if the "Use assigned calendar to specify the number of work hours for each time period" checkbox, accessed from the P6 Application Settings, is not marked. If this checkbox is not marked, default hours per time period settings are defined from the P6 Application Settings.

Working hours defined with decimal values other than .0 or .5 will round up or down to .0 or .5.