You can define a list of public holidays in your company in Configuration → Holidays tab.
You can add them by importing them from Google. When adding public holidays, remember to select only those days that will be days off.
To add a list of holidays, go to Configuration → Holidays → select the calendar and year:
1. Click Import from Google and select the country and year
2. Select the holidays you want to add to your calendar from the list
3. Save changes

How do I add holidays for the following year?
If you want to add holidays for the following year, select the appropriate year from the drop-down list:

Tip: It is also possible to manually add a holiday to the Calamari calendar.
Go to Configuration → Holidays → Add.

Important: In Calamari you can also delete or edit a holiday that has already been added to the list:

Check also: How to add public holidays for different countries?