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TimeZoneInfo.TransitionTime.DayOfWeek Property

Gets the day of the week on which the time change occurs.

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

public DayOfWeek DayOfWeek { get; }

Property Value

Type: System.DayOfWeek
The day of the week on which the time change occurs.

The DayOfWeek property returns a valid value only if the IsFixedDateRule property is false.

The DayOfWeek property indicates the day of the week on which a floating-date rule is applied (for example, the second Sunday of November). In contrast, the Day property indicates the day of the month on which a fixed-date rule is applied (for example, April 15).

The following example enumerates the time zones found on the local computer and displays transition time information for all floating-date transitions. The time information includes the day of the week on which the time change occurs.

private enum WeekOfMonth
{
   First = 1,
   Second = 2,
   Third = 3,
   Fourth = 4,
   Last = 5
}

private void GetFloatingTransitionTimes()
{
   ReadOnlyCollection<TimeZoneInfo> timeZones = TimeZoneInfo.GetSystemTimeZones();
   foreach (TimeZoneInfo zone in timeZones)
   {
      TimeZoneInfo.AdjustmentRule[] adjustmentRules = zone.GetAdjustmentRules();
      DateTimeFormatInfo dateInfo = CultureInfo.CurrentCulture.DateTimeFormat;
      foreach (TimeZoneInfo.AdjustmentRule adjustmentRule in adjustmentRules)
      {
         TimeZoneInfo.TransitionTime daylightStart = adjustmentRule.DaylightTransitionStart;
         if (! daylightStart.IsFixedDateRule)
            Console.WriteLine("{0}, {1:d}-{2:d}: Begins at {3:t} on the {4} {5} of {6}.", 
                              zone.StandardName, 
                              adjustmentRule.DateStart, 
                              adjustmentRule.DateEnd,                                 
                              daylightStart.TimeOfDay, 
                              ((WeekOfMonth)daylightStart.Week).ToString(),  
                              daylightStart.DayOfWeek.ToString(),
                              dateInfo.GetMonthName(daylightStart.Month));

         TimeZoneInfo.TransitionTime daylightEnd = adjustmentRule.DaylightTransitionEnd;
         if (! daylightEnd.IsFixedDateRule)
            Console.WriteLine("{0}, {1:d}-{2:d}: Ends at {3:t} on the {4} {5} of {6}.", 
                              zone.StandardName, 
                              adjustmentRule.DateStart, 
                              adjustmentRule.DateEnd,                                 
                              daylightEnd.TimeOfDay, 
                              ((WeekOfMonth)daylightEnd.Week).ToString(),  
                              daylightEnd.DayOfWeek.ToString(), 
                              dateInfo.GetMonthName(daylightEnd.Month));
      }
   }   
}

.NET Framework

Supported in: 4.5.3, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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