public bool IsHoliday(DateTime date)
{
//土日・祝日ならばfalse
//WEEKDAY = 月～日 != 平日
var dayInfo = HolidayChecker.Holiday(date);
if (dayInfo.holiday != HolidayChecker.HolidayInfo.HOLIDAY.WEEKDAY ||
(dayInfo.week == DayOfWeek.Saturday || dayInfo.week == DayOfWeek.Sunday) ||
(dayInfo.name == "１２月３１日" || dayInfo.name == "１月２日" || dayInfo.name == "１月３日"))
{
return(true);
}
return(false);
}