Holiday List and its connection to buying process

Hi;
In Company there is a field named Default Holiday List, i want to know on which sections did this list effect?
cause some of erp software has caledar with connected holiday list that afftects on their distribution or sales cycle;

would u plz hepl me if i can connect a holidays list to buying process so that holiday days will not be considered in due dates ?

BR

These holiday lists are linked to Employee master. It is consider when that Employee applies for the leave. The days included in the holiday list is not considered in the leave calculation.

You can write script in Python/JS which can check the Due Date against dates mentioned in Holiday List. It is a simple fetch the list, compare the date and if equal throw error and prevent save or submit.