ScheduleRuleData.IsDstAdjusted Property

[DataMemberAttribute(Name = "isDstAdjusted", EmitDefaultValue = false)]
public bool IsDstAdjusted { get; set; }

<DataMemberAttribute(Name := "isDstAdjusted", EmitDefaultValue := false)>
Public Property IsDstAdjusted As Boolean
	Get
	Set

public:
[DataMemberAttribute(Name = L"isDstAdjusted", EmitDefaultValue = false)]
property bool IsDstAdjusted {
	bool get ();
	void set (bool value);
}

[<DataMemberAttribute(Name = "isDstAdjusted", EmitDefaultValue = false)>]
member IsDstAdjusted : bool with get, set

Property Value

It set to true, the calculation of the Next Run Time will be adjusted according to the daylight savings time (DST) rules associated with the specified TimeZoneId. If set to false, the calculation is made in Coordinated Universal Time (UTC) and not adjusted to any time zone DST.

Set it to false if you want to keep constant interval between your scheduled jobs. Set it to true if you want to have the scheduled job run at exact local time(s).

For example, consider the following scenario: you created a rule "At 4:00 PM every day, starting 2016-01-01", so some notification email will be sent to you at this time; your web server is in Eastern Time.

If you set it to false, the 4:00 PM would be saved and calculated as 9:00 PM UTC every day, and the notification email comes at 4:00 PM. Once the DST starts on 2016-03-13, the notification email will start coming at 5:00 PM Eastern Time, because the UTC offset has changed from 5 to 4 hours.

If you set to true and specify the time zone as "Eastern Time", the 4:00 PM would be saved and calculated as a UTC time that always converted to 4:00 PM, no matter if DST is in effect or not.

Note that if you set it to true, and the calculated next run time produces an invalid local time (see IsInvalidTime(DateTime)), it would be adjusted according to the time zone DST rules. For example, next run time calculated as 2016-03-13 2:00 AM local time would become 2016-03-13 3:00 AM local time.

Similarly, if you set it to true, and calculation of next run time produces an ambiguous local time (see IsAmbiguousTime(DateTime)), it would be calculated as after DST ends. For example, next run time calculated as 2016-11-06 1:00 AM Eastern Time would be translated to 2016-11-06 6:00 AM UTC, which maps back to 2016-11-06 1:00 AM ET after DST ends (and not to 2016-11-06 5:00 AM UTC, which could have mapped back to 2016-11-06 1:00 AM ET during the DST).

Reference