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TimeZone Class

Represents a time zone.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public MustInherit Class TimeZone
'Usage
Dim instance As TimeZone

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public abstract class TimeZone
SerializableAttribute 
ComVisibleAttribute(true) 
public abstract class TimeZone

A time zone is a geographical region in which the same standard time is used.

The following code example references and displays selected TimeZone class elements.

' Example of selected TimeZone class elements.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic

Module TimeZoneDemo

    Sub Main( )

        Const dataFmt As String = "{0,-30}{1}"
        Const timeFmt As String = "{0,-30}{1:yyyy-MM-dd HH:mm}"

        Console.WriteLine( "This example of selected " & _
            "TimeZone class elements generates the following " & _
            vbCrLf & "output, which varies depending on the " & _
            "time zone in which it is run." & vbCrLf )

        ' Get the local time zone and the current local time and year.
        Dim localZone As TimeZone = TimeZone.CurrentTimeZone
        Dim currentDate As DateTime = DateTime.Now
        Dim currentYear As Integer = currentDate.Year

        ' Display the names for standard time and daylight saving 
        ' time for the local time zone.
        Console.WriteLine( dataFmt, "Standard time name:", _
            localZone.StandardName )
        Console.WriteLine( dataFmt, "Daylight saving time name:", _
            localZone.DaylightName )

        ' Display the current date and time and show if they occur 
        ' in daylight saving time.
        Console.WriteLine( vbCrLf & timeFmt, _
            "Current date and time:", currentDate )
        Console.WriteLine( dataFmt, "Daylight saving time?", _
            localZone.IsDaylightSavingTime( currentDate ) )

        ' Get the current Coordinated Universal Time (UTC) and UTC 
        ' offset.
        Dim currentUTC As DateTime = _
            localZone.ToUniversalTime( currentDate )
        Dim currentOffset As TimeSpan = _
            localZone.GetUtcOffset( currentDate )

        Console.WriteLine( timeFmt, "Coordinated Universal Time:", _
            currentUTC )
        Console.WriteLine( dataFmt, "UTC offset:", currentOffset )

        ' Get the DaylightTime object for the current year.
        Dim daylight As DaylightTime = _
            localZone.GetDaylightChanges( currentYear )

        ' Display the daylight saving time range for the current year.
        Console.WriteLine( vbCrLf & _
            "Daylight saving time for year {0}:", currentYear )
        Console.WriteLine( "{0:yyyy-MM-dd HH:mm} to " & _
            "{1:yyyy-MM-dd HH:mm}, delta: {2}", _
            daylight.Start, daylight.End, daylight.Delta )
    End Sub 
End Module 

' This example of selected TimeZone class elements generates the following
' output, which varies depending on the time zone in which it is run.
' 
' Standard time name:           Pacific Standard Time
' Daylight saving time name:    Pacific Standard Time
' 
' Current date and time:        2003-05-05 12:38
' Daylight saving time?         True
' Coordinated Universal Time:   2003-05-05 19:38
' UTC offset:                   -07:00:00
' 
' Daylight saving time for year 2003:
' 2003-04-06 02:00 to 2003-10-26 02:00, delta: 01:00:00

// Example of selected TimeZone class elements.
import System.*;
import System.Globalization.*;

class TimeZoneDemo
{
    public static void main(String[] args)
    {
        final String dataFmt = "{0,-30}{1}";
        final String timeFmt = "{0,-30}{1:yyyy-MM-dd HH:mm}";

        Console.WriteLine(("This example of selected TimeZone class " 
            + "elements generates the following \n" 
            + "output, which varies depending on the " 
            + "time zone in which it is run.\n"));

        // Get the local time zone and the current local time and year.
        TimeZone localZone = TimeZone.get_CurrentTimeZone();
        DateTime currentDate = DateTime.get_Now();
        int currentYear = currentDate.get_Year();

        // Display the names for standard time and daylight saving 
        // time for the local time zone.
        Console.WriteLine(dataFmt, "Standard time name:",
            localZone.get_StandardName());
        Console.WriteLine(dataFmt, "Daylight saving time name:",
            localZone.get_DaylightName());

        // Display the current date and time and show if they occur 
        // in daylight saving time.
        Console.WriteLine("\n" + timeFmt, "Current date and time:", 
            currentDate);
        Console.WriteLine(dataFmt, "Daylight saving time?",
            String.valueOf(localZone.IsDaylightSavingTime(currentDate)));

        // Get the current Coordinated Universal Time (UTC) and UTC 
        // offset.
        DateTime currentUTC = localZone.ToUniversalTime(currentDate);
        TimeSpan currentOffset = localZone.GetUtcOffset(currentDate);

        Console.WriteLine(timeFmt,"Coordinated Universal Time:", currentUTC);
        Console.WriteLine(dataFmt, "UTC offset:", currentOffset);

        // Get the DaylightTime object for the current year.
        DaylightTime daylight = localZone.GetDaylightChanges(currentYear);

        // Display the daylight saving time range for the current year.
        Console.WriteLine("\nDaylight saving time for year {0}:", 
            String.valueOf(currentYear));
        Console.WriteLine("{0:yyyy-MM-dd HH:mm} to " + 
            "{1:yyyy-MM-dd HH:mm},delta: {2}",
            daylight.get_Start(), daylight.get_End(),
            daylight.get_Delta());
    } //main
} //TimeZoneDemo

/*
This example of selected TimeZone class elements generates the following
output, which varies depending on the time zone in which it is run.

Standard time name:           Pacific Standard Time
Daylight saving time name:    Pacific Standard Time

Current date and time:        2003-05-08 11:10
Daylight saving time?         True
Coordinated Universal Time:   2003-05-08 18:10
UTC offset:                   -07:00:00

Daylight saving time for year 2003:
2003-04-06 02:00 to 2003-10-26 02:00, delta: 01:00:00
*/

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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