You add a date range to a calendar to specify two or more consecutive days with a specific start and end date, such as 19 March to 23 March, 2013.
In WorkStation, in the System Tree pane, select the calendar you want to add the exception to.
Click the Calendar Editor tab.
On the Calendar Editor toolbar, click the Add Date Range button
In the Entry name box, type the name that you want to display on the date list.
In the Start year box, select the year for the start date.
In the Start month box, select the month for the start date.
In the Day of month box, select the day for the start date.
In the Day of week box, select the weekday for the start date.
In the Year box, select the year for the end date.
In the Month box, select the month for the end date.
In the Day of month box, select the day for the end date.
In the Day of week box, select the weekday for the end date.
Click OK .
On the File menu, click Save .