To add holidays, go to Settings>>Humans>>Public Holidays page and click on Add New button. You can choose to add holidays to different years.
If it is a recurring holiday, check “Recurring” box and choose “Monthly” or “Yearly”.
Once the Recurring box is checked, the holiday will be added automatically to each coming year/month.
If it is a day off, the leave requests added to that date will not be counted and the left leave days per year will not decrease.
However, you can choose that it is taken from the annual leave allowance which will decrease the number of allowed leave days.