You can add holidays to a calendar on the Calendar Periods tab of the Calendar view.
To add a holiday to a calendar:
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Display the Calendar view of the calendar that you want to update.
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Select the Calendar Periods tab.
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In the Holidays group box, click the
Date field to display a pop-up calendar, and select a date.
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Select the
Repeat Yearly? option if you want to mark the selected date as a holiday in the succeeding years.
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Click
Add to add the selected date as a holiday in the calendar.
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Select
Automatically recalculate productive hours? to recalculate the productive hours based on any changes to the holidays.
Cobra recalculates the productive hours when you click
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on the Quick Access toolbar or when you leave the Calendar Periods tab.