Class DateAdjusters

Factory class for date adjusters: functions from LocalDate to LocalDate, which can be applied to LocalDate, LocalDateTime, and OffsetDateTime.

Since 2.0.x

Availability netstandard2.0

Inheritance

Object

DateAdjusters

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: NodaTime

Assembly: NodaTime.dll

Syntax

public static class DateAdjusters

Properties

EndOfMonth

A date adjuster to move to the last day of the current month.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> EndOfMonth { get; }

Property Value

Type	Description
Func<LocalDate, LocalDate>	A date adjuster to move to the last day of the current month.

StartOfMonth

A date adjuster to move to the first day of the current month.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> StartOfMonth { get; }

Property Value

Type	Description
Func<LocalDate, LocalDate>	A date adjuster to move to the first day of the current month.

Methods

AddPeriod(Period)

Creates a date adjuster to add the specified period to the date.

Since 3.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> AddPeriod(Period period)

Parameters

Type	Name	Description
Period	period	The period to add when the adjuster is invoked. Must not contain any (non-zero) time units.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which adds the specified period.

Remarks

This is the adjuster equivalent of Plus(Period).

Sample snippet

using NodaTime;
using System;

LocalDateTime localDateTime = new LocalDateTime(1985, 10, 26, 1, 18);
Offset offset = Offset.FromHours(-5);
OffsetDateTime original = new OffsetDateTime(localDateTime, offset);

var dateAdjuster = DateAdjusters.AddPeriod(Period.FromYears(30));
OffsetDateTime updated = original.With(dateAdjuster);

Console.WriteLine(updated.LocalDateTime);
Console.WriteLine(updated.Offset);

Output:

10/26/2015 01:18:00
-05

DayOfMonth(Int32)

A date adjuster to move to the specified day of the current month.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> DayOfMonth(int day)

Parameters

Type	Name	Description
Int32	day	The day of month to adjust dates to.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which changes the day to day, retaining the same year and month.

Remarks

The returned adjuster will throw an exception if it is applied to a date that would create an invalid result.

Sample snippet

using NodaTime;
using System;

var start = new LocalDate(2014, 6, 27);

var adjuster = DateAdjusters.DayOfMonth(19);

Console.WriteLine(adjuster(start));

Output:

Thursday, 19 June 2014

Month(Int32)

A date adjuster to move to the same day of the specified month.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> Month(int month)

Parameters

Type	Name	Description
Int32	month	The month to adjust dates to.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which changes the month to month, retaining the same year and day of month.

Remarks

The returned adjuster will throw an exception if it is applied to a date that would create an invalid result.

Sample snippet

using NodaTime;
using System;

var start = new LocalDate(2014, 6, 27);

var adjuster = DateAdjusters.Month(2);

Console.WriteLine(adjuster(start));

Output:

Thursday, 27 February 2014

Next(IsoDayOfWeek)

A date adjuster to move to the next specified day-of-week, adding a week if the day is already correct.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> Next(IsoDayOfWeek dayOfWeek)

Parameters

Type	Name	Description
IsoDayOfWeek	dayOfWeek	The day-of-week to adjust dates to.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which advances a date to the next occurrence of the specified day-of-week.

Remarks

This is the adjuster equivalent of Next(IsoDayOfWeek).

Sample snippet

using NodaTime;
using System;

var start = new LocalDate(2014, 6, 27);

var adjuster = DateAdjusters.Next(IsoDayOfWeek.Thursday);

Console.WriteLine(adjuster(start));

Output:

Thursday, 03 July 2014

NextOrSame(IsoDayOfWeek)

A date adjuster to move to the next specified day-of-week, but return the original date if the day is already correct.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> NextOrSame(IsoDayOfWeek dayOfWeek)

Parameters

Type	Name	Description
IsoDayOfWeek	dayOfWeek	The day-of-week to adjust dates to.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which advances a date to the next occurrence of the specified day-of-week, or the original date if the day is already correct.

Sample snippet

using NodaTime;
using System;

var start = new LocalDate(2014, 6, 27);

var adjuster = DateAdjusters.NextOrSame(IsoDayOfWeek.Friday);

Console.WriteLine(adjuster(start));

Output:

Friday, 27 June 2014

Previous(IsoDayOfWeek)

A date adjuster to move to the previous specified day-of-week, subtracting a week if the day is already correct.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> Previous(IsoDayOfWeek dayOfWeek)

Parameters

Type	Name	Description
IsoDayOfWeek	dayOfWeek	The day-of-week to adjust dates to.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which advances a date to the previous occurrence of the specified day-of-week.

Remarks

This is the adjuster equivalent of Previous(IsoDayOfWeek).

Sample snippet

using NodaTime;
using System;

var start = new LocalDate(2014, 6, 27);

var adjuster = DateAdjusters.Previous(IsoDayOfWeek.Thursday);

Console.WriteLine(adjuster(start));

Output:

Thursday, 26 June 2014

PreviousOrSame(IsoDayOfWeek)

A date adjuster to move to the previous specified day-of-week, but return the original date if the day is already correct.

Since 2.0.x

Availability netstandard2.0

Declaration

public static Func<LocalDate, LocalDate> PreviousOrSame(IsoDayOfWeek dayOfWeek)

Parameters

Type	Name	Description
IsoDayOfWeek	dayOfWeek	The day-of-week to adjust dates to.

Returns

Type	Description
Func<LocalDate, LocalDate>	An adjuster which advances a date to the previous occurrence of the specified day-of-week, or the original date if the day is already correct.

Sample snippet

using NodaTime;
using System;

var start = new LocalDate(2014, 6, 27);

var adjuster = DateAdjusters.PreviousOrSame(IsoDayOfWeek.Friday);

Console.WriteLine(adjuster(start));

Output:

Friday, 27 June 2014