Public & Business Holidays are recorded in SetupApps > LeaveManager > Holiday Planning or > Holiday Calendar.
The holiday date(s) & name by Leave Year can be set in:
> Holiday Calendar or,
> Holiday Planning in the section 'Add Public or Business Holidays' .
The next step is to assign the holiday(s) to any specific location, branch, & user in the section 'Assign Public or Business Holidays to Users'.