There are two different interpretations for this property, depending on the value of StandardDayOfWeek. In one case, StandardDay defines the day-in-month on which daylight saving time ends. This interpretation is used when the StandardDayOfWeek is 0. A positive or negative integer is specified to indicate whether the StandardDay is calculated from the beginning or the end of the month. For example, 5 indicates the fifth day in the StandardMonth and -1 indicates the last day in the StandardMonth. When StandardDayOfWeek is not 0, StandardDay is the day-in-month on which daylight saving time ends, as defined in conjunction with StandardDayOfWeek. For example, if StandardDay is 15 and StandardDayOfWeek is Saturday, then daylight saving time ends on the first Saturday on or after the 15th day in the StandardMonth (that is, the third Saturday in the month). If StandardDay is 20 and StandardDayOfWeek is -Saturday, then this indicates the first Saturday on or before the 20 th day in the StandardMonth. If StandardDay is -1 and StandardDayOfWeek is -Sunday, then this indicates the last Sunday in the StandardMonth.