All done in Voicemail Pro Client.
1. Go to the "Condition Editor"
2. from the Dialogue that comes up add a "Calendar" it looks like a calendar page with 31 written on it.
3. Once the Calendar is created, double click on it, and click on the days you want your holiday message to play.
4. Click Ok till you are back to your Modules screen.
5. Now insert a Condition Action from the VM Pro client menu, looks like a yellow triangle with a checkmark to the top right of it.
6. Double Click the Condition action. On the first tab, give it a token name like "Test Holiday" on the Specific tab from the drop down maenu, pick the Holiday Calendar we made earlier. Click ok.
Now you are ready to put things in action.
This is how mine works.
Modules > AA
Start Point -> Test Holiday
If True -> Holiday Menu
If False -> Regular Menu.
In the Holiday Menu, I have the holiday greeting being played, and ofcourse the menu options are different so no zero for receptionist since nobody will be there to answer calls.
I'm sure there are other ways of doing this.
This is how I've done mine and it works.