Microsoft.JScript.DatePrototype.DaylightSavingsTime C# (CSharp) Méthode

      private static bool DaylightSavingsTime(double localTime) {
        if (!useDST)
          return false;
        double t = (localTime + msTo1970) * ticksPerMillisecond;
        if ((double)Int64.MinValue <= t && t <= (double)Int64.MaxValue)
          try {
            DateTime dt = new DateTime((long)t);
            return System.TimeZone.CurrentTimeZone.IsDaylightSavingTime(dt);
          }catch (System.ArgumentOutOfRangeException) { }

        int month = MonthFromTime(localTime);
        if (month < 3 || month > 9) return false;
        if (month > 3 && month < 9) return true;
        int date = DateFromTime(localTime);
        if (month == 3) {
          if (date > 7) return true;
          int weekDay = WeekDay(localTime);
          if (weekDay > 0)
            return date > weekDay;
          return HourFromTime(localTime) > 1;
        } else {
          if (date < 25) return true;
          int weekDay = WeekDay(localTime);
          if (weekDay > 0)
            return date - weekDay < 25;
          return HourFromTime(localTime) < 1;
        }
      }