AF SDK Reference

AFTimeZone.IsDaylightSavingTime Method

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AFTimeZone.IsDaylightSavingTime Method

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Last UpdatedNov 18, 2025
2 minute read

Returns a value indicating whether a specified date and time is within a daylight savings time period.

Namespace: OSIsoft.AF.Time
Assembly: OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 3.1.1.1182

Syntax

public override bool IsDaylightSavingTime(
	DateTime time
)

Public Overrides Function IsDaylightSavingTime ( 
	time As DateTime
) As Boolean

Dim instance As AFTimeZone
Dim time As DateTime
Dim returnValue As Boolean

returnValue = instance.IsDaylightSavingTime(time)

public:
virtual bool IsDaylightSavingTime(
	DateTime time
) override

abstract IsDaylightSavingTime : 
        time : DateTime -> bool 
override IsDaylightSavingTime : 
        time : DateTime -> bool

Parameters

time: Type: SystemDateTime
A date and time value.

Return Value

Type: Boolean
Returns if time is in a daylight saving time period; otherwise.

Remarks

The return value is affected by the relationship between the time zone and the specified time parameter. See for more information.

AF SDK Reference

AFTimeZone.IsDaylightSavingTime Method

Table of Contents

AFTimeZone.IsDaylightSavingTime Method

Syntax

Parameters

Return Value

Remarks

Version Information

AFSDK

See Also

Reference

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