DayOfWeek Enumeration
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DayOfWeek Enumeration

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Specifies the day of the week.

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

public enum DayOfWeek

Member nameDescription
FridayIndicates Friday.
MondayIndicates Monday.
SaturdayIndicates Saturday.
SundayIndicates Sunday.
ThursdayIndicates Thursday.
TuesdayIndicates Tuesday.
WednesdayIndicates Wednesday.

The DayOfWeek enumeration represents the day of the week in calendars that have seven days per week. The value of the constants in this enumeration ranges from DayOfWeek.Sunday to DayOfWeek.Saturday. If cast to an integer, its value ranges from zero (which indicates DayOfWeek.Sunday) to six (which indicates DayOfWeek.Saturday).

This enumeration is useful when it is desirable to have a strongly typed specification of the day of the week. For example, this enumeration is the type of the property value for the DateTime.DayOfWeek property.

The members of the DayOfWeek enumeration are not localized. To return the localized name of the day of the week, call the DateTime.ToString(String) or the DateTime.ToString(String, IFormatProvider) method with either the "ddd" or "dddd" format strings. The former format string produces the abbreviated weekday name; the latter produces the full weekday name.

The following example demonstrates the DateTime.DayOfWeek property and the DayOfWeek enumeration.

// This example demonstrates the DateTime.DayOfWeek property
using System;

class Example
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      // Assume the current culture is en-US.
      // Create a DateTime for the first of May, 2003.
      DateTime dt = new DateTime(2003, 5, 1);
      outputBlock.Text += String.Format("Is Thursday the day of the week for {0:d}?: {1}",
                         dt, dt.DayOfWeek == DayOfWeek.Thursday) + "\n";
      outputBlock.Text += String.Format("The day of the week for {0:d} is {1}.", dt, dt.DayOfWeek) + "\n";
This example produces the following results:

Is Thursday the day of the week for 5/1/2003?: True
The day of the week for 5/1/2003 is Thursday.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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