Add function to add holiday. Part to add it to list not yet implemented
Add function to add holiday. Part to add it to list not yet implemented

tnrangwi/CompareProgrammingUsingHolidayManager,tnrangwi/CompareProgrammingUsingHolidayManager,tnrangwi/CompareProgrammingUsingHolidayManager,tnrangwi/CompareProgrammingUsingHolidayManager,tnrangwi/CompareProgrammingUsingHolidayManager,tnrangwi/CompareProgrammingUsingHolidayManager