private DateTime GetHolidayDate(int year, HolidayDefinition holidayDefinition)
{
return(Enum.Parse <HolidayPlacementStrategy>(holidayDefinition.PlacementStrategy) switch
{
HolidayPlacementStrategy.FixedDate => DateUtils.CalculateFixedDatePlacement(year,
holidayDefinition.Month, holidayDefinition.Day),
HolidayPlacementStrategy.FixedDay => DateUtils.CalculateFixedDayPlacement(year, holidayDefinition.Month,
holidayDefinition.DayOfWeek, holidayDefinition.WeekOfMonth),
HolidayPlacementStrategy.FixedDateNonWeekend => DateUtils.CalculateFixedDateNonWeekendPlacement(year,
holidayDefinition.Month, holidayDefinition.Day),
_ => throw new InvalidOperationException($"'{holidayDefinition.PlacementStrategy}' is not handled")
});
