You are able to add holidays to your TM3 diary. For example, Christmas day, Boxing day and Easter etc.
You add these via the Diary section under TM3 settings.
When you click on Diary it will give you two options to choose from. Click on General.
If you scroll to the bottom of this page you will see a Holiday Dates section. The image below shows that three holidays have been added.
To add a new holiday you simply click Add Holiday Date. This brings up the screen below.
The next step would be for you to click on the calendar icon at the top right and this will pop up a calendar which you can see in the following image. It is at this point that you choose your holiday date and then click Add.
The new holiday date we added now appears in our list.
The image below shows what the diary looks like on the date of the holiday compared to a non-holiday date.