DateTimeFormatInfo.RFC1123Pattern Property

Definition

Gets the custom format string for a time value that is based on the Internet Engineering Task Force (IETF) Request for Comments (RFC) 1123 specification.

public string RFC1123Pattern { get; }
Property Value

The custom format string for a time value that is based on the IETF RFC 1123 specification.

Examples

The following example displays the value of RFC1123Pattern for a few cultures.

using namespace System;
using namespace System::Globalization;
void PrintPattern( String^ myCulture )
{
   CultureInfo^ MyCI = gcnew CultureInfo( myCulture,false );
   DateTimeFormatInfo^ myDTFI = MyCI->DateTimeFormat;
   Console::WriteLine( " {0} {1}", myCulture, myDTFI->RFC1123Pattern );
}

int main()
{
   
   // Displays the values of the pattern properties.
   Console::WriteLine( " CULTURE    PROPERTY VALUE" );
   PrintPattern( "en-US" );
   PrintPattern( "ja-JP" );
   PrintPattern( "fr-FR" );
}

/*
This code produces the following output.

CULTURE    PROPERTY VALUE
en-US     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
ja-JP     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
fr-FR     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'

*/
using System;
using System.Globalization;


public class SamplesDTFI  {

   public static void Main()  {

      // Displays the values of the pattern properties.
      Console.WriteLine( " CULTURE    PROPERTY VALUE" );
      PrintPattern( "en-US" );
      PrintPattern( "ja-JP" );
      PrintPattern( "fr-FR" );

   }

   public static void PrintPattern( String myCulture )  {

      DateTimeFormatInfo myDTFI = new CultureInfo( myCulture, false ).DateTimeFormat;
      Console.WriteLine( "  {0}     {1}", myCulture, myDTFI.RFC1123Pattern );

   }

}

/*
This code produces the following output.

 CULTURE    PROPERTY VALUE
  en-US     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
  ja-JP     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
  fr-FR     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'

*/
Imports System
Imports System.Globalization

Public Class SamplesDTFI

   Public Shared Sub Main()

      ' Displays the values of the pattern properties.
      Console.WriteLine(" CULTURE    PROPERTY VALUE")
      PrintPattern("en-US")
      PrintPattern("ja-JP")
      PrintPattern("fr-FR")

   End Sub 'Main

   Public Shared Sub PrintPattern(myCulture As [String])

      Dim myDTFI As DateTimeFormatInfo = New CultureInfo(myCulture, False).DateTimeFormat
      Console.WriteLine("  {0}     {1}", myCulture, myDTFI.RFC1123Pattern)

   End Sub 'PrintPattern 

End Class 'SamplesDTFI

'This code produces the following output.
'
' CULTURE    PROPERTY VALUE
'  en-US     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
'  ja-JP     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
'  fr-FR     ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
'

Remarks

The RFC1123Pattern property defines the culture-specific format of date strings that are returned by calls to the DateTime.ToString and DateTimeOffset.ToString methods and by composite format strings that are supplied the "r" and "R" standard format strings.

The RFC1123 pattern reflects a defined standard, and the property is read-only. Therefore, it is always the same, regardless of the culture. The custom format string is "ddd, dd MMM yyyy HH':'mm':'ss 'GMT'".

Applies to