AMDesignator Property

DateTimeFormatInfo.AMDesignator Property


Gets or sets the string designator for hours that are "ante meridiem" (before noon).

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

public string AMDesignator { get; set; }

Property Value

Type: System.String

The string designator for hours that are ante meridiem. The default for InvariantInfo is "AM".

Exception Condition

The property is being set to null.


The property is being set and the DateTimeFormatInfo object is read-only.

TheAMDesignator property is used for all times from 0:00:00 (midnight) to 11:59:59.999.

If a custom format string includes the "tt" format specifier and the time is before noon, the DateTime.ToString or ToString method includes the value of the AMDesignator property in place of "tt" in the result string. If the custom format string includes the "t" custom format specifier, only the first character of the AMDesignator property value is included. You should use "tt" for languages for which it is necessary to maintain the distinction between A.M. and P.M. An example is Japanese, in which the A.M. and P.M. designators differ in the second character instead of the first character.

For cultures that do not use an A.M. designator, this property returns an empty string.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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