Much as with business-hour collections, Lync administrators can create a holiday set to define the appropriate holiday schedule for a business. A holiday set can also be created only using the Lync Server Management Shell.
The first step in defining a holiday set is to create a unique variable for each holiday, which defines a name, a start date, and an end date. After all the holidays are stored in a variable, they can be added to a holiday set. To create a holiday and store it in a variable, follow this syntax:
$Christmas = New-CsRgsHoliday -Name <Holiday Name> -StartDate <Date formatted as dd/mm/yyyy> -EndDate <Date formatted as dd/mm/yyyy>
After repeating the previous step to create each of the holiday objects, use ...