How to Create a Calendar Item
You create a calendar item to define work days, work hours, and holidays in System Center 2012 – Service Manager. After you create a calendar item, you will use it as part of a service level objective, where it is measured against a time metric.
To create a calendar item
In the Service Manager console, click Administration.
In the Administration pane, expand Service Level Management, and then click Calendar.
In the Tasks pane, under Calendar, click Create Calendar.
In the Create/Edit Calendar dialog box, in the Title box, type a title for the calendar. For example, type Normal Work Calendar.
In the Time zone list, select the time zone of your location.
Under Working days and hours, select the work days of your organization and for each selected day, type the start and end time for each day.
Under Holidays, click Add to define any holidays that your organization does not normally work. In the Add Holiday dialog box, type the name and select the date of the holiday and then click OK to close the dialog box.
Click OK to close the Create/Edit Calendar dialog box.