TimeZoneInfo.TransitionTime.CreateFixedDateRule Method

Definition

Namespace:

System

Assemblies:

netstandard.dll, System.Runtime.dll

Source:

TimeZoneInfo.TransitionTime.cs

Defines a time change that uses a fixed-date rule (that is, a time change that occurs on a specific day of a specific month).

C#

public static TimeZoneInfo.TransitionTime CreateFixedDateRule(DateTime timeOfDay, int month, int day);

Parameters

timeOfDay

DateTime

The time at which the time change occurs. This parameter corresponds to the TimeOfDay property.

month

Int32

The month in which the time change occurs. This parameter corresponds to the Month property.

day

Int32

The day of the month on which the time change occurs. This parameter corresponds to the Day property.

Returns

TimeZoneInfo.TransitionTime

Data about the time change.

Exceptions

ArgumentException

The timeOfDay parameter has a non-default date component.

-or-

The timeOfDay parameter's Kind property is not Unspecified.

-or-

The timeOfDay parameter does not represent a whole number of milliseconds.

ArgumentOutOfRangeException

The month parameter is less than 1 or greater than 12.

-or-

The day parameter is less than 1 or greater than 31.

Examples

The following example creates time zone transitions for an imaginary time zone by using both a fixed-date rule and a floating-date rule. The fixed-date rule defines a time zone adjustment that starts at 2:00 A.M. on March 15 and ends at 3:00 A.M. on November 15 for the years 1900 to 1955.

C#

// Declare necessary TimeZoneInfo.AdjustmentRule objects for time zone
TimeZoneInfo imaginaryTZ;
TimeSpan delta = new TimeSpan(1, 0, 0);
TimeZoneInfo.AdjustmentRule adjustment;
List<TimeZoneInfo.AdjustmentRule> adjustmentList = new List<TimeZoneInfo.AdjustmentRule>();
// Declare transition time variables to hold transition time information
TimeZoneInfo.TransitionTime transitionRuleStart, transitionRuleEnd;
                      
// Define a fictitious new time zone consisting of fixed and floating adjustment rules 
// Define fixed rule (for 1900-1955)
transitionRuleStart = TimeZoneInfo.TransitionTime.CreateFixedDateRule(new DateTime(1, 1, 1, 2, 0, 0), 3, 15);
transitionRuleEnd = TimeZoneInfo.TransitionTime.CreateFixedDateRule(new DateTime(1, 1, 1, 3, 0, 0), 11, 15);
adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(new DateTime(1900, 1, 1), new DateTime(1955, 12, 31), 
             delta, transitionRuleStart, transitionRuleEnd);
adjustmentList.Add(adjustment);
// Define floating rule (for 1956- )
transitionRuleStart = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 2, 0, 0), 3, 5, DayOfWeek.Sunday);
transitionRuleEnd = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 3, 0, 0), 10, 4, DayOfWeek.Sunday); 
adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(new DateTime(1956, 1, 1), DateTime.MaxValue.Date, delta, transitionRuleStart, transitionRuleEnd);
adjustmentList.Add(adjustment); 

// Create fictitious time zone   
imaginaryTZ = TimeZoneInfo.CreateCustomTimeZone("Fictitious Standard Time", new TimeSpan(-9, 0, 0), 
                "(GMT-09:00) Fictitious Time", "Fictitious Standard Time", 
                "Fictitious Daylight Time", adjustmentList.ToArray());

Remarks

This method creates a fixed-date rule (that is, a time change that occurs on a specific day of a specific month). For example, a time change that always occurs on October 28 follows a fixed-date rule.

For transitions from standard time to daylight saving time, the timeOfDay argument represents the time of the transition in the time zone's standard time. For transitions from daylight saving time to standard time, it represents the time of the transition in the time zone's daylight saving time. Note that this is a DateTime value whose year, month, and date values must all equal 1.

Applies to