public bool IsHoliDay(DateTime day)
{
var map = holidaysObservancesCache.GetOrAdd(day.Year, () => BuildObservancesMap(day.Year));
return(map.Any(m => m.Key.Date == day.Date));
}
public override DateTime?GetInstance(int year)
{
return(dayCache.GetOrAdd(year, () => CalculateDayInYear(year)));
}
public static DateTime CalculateEasterDate(int year)
{
return(easterPerYear.GetOrAdd(year, () => GetEasterDate(year)));
}