Go to Settings >Attendance Settings.
Select Holidays tab.
Click the (+) Add button on the right side to add new Holiday.
<aside> 💡 In selecting a Day Type, choose what day type you will apply on that Holiday. (e. g. Holiday Name: Christmas; Day Type: Rest Day; Toggle Switch: Regular Holiday)
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<aside> 💡 To set up a Day Type, visit this article, Add Schedule with Work Day Type
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Click Save.
Click the button in the "Apply to Branch/Area" column to apply Holidays to areas.
Move the Branch/Area you want to apply the Holidays from left to right box using the arrows inbetween.
Click Save.