Module

Data.Date

#Date 

data Date

A date value in the Gregorian calendar.

Instances

#canonicalDate 

canonicalDate :: Year -> Month -> Day -> Date

Constructs a date from year, month, and day components. The resulting date components may not be identical to the input values, as the date will be canonicalised according to the Gregorian calendar. For example, date values for the invalid date 2016-02-31 will be corrected to 2016-03-02.

#exactDate 

exactDate :: Year -> Month -> Day -> Maybe Date

Constructs a date from year, month, and day components. The result will be Nothing if the provided values result in an invalid date.

#year 

year :: Date -> Year

The year component of a date value.

#month 

month :: Date -> Month

The month component of a date value.

#day 

day :: Date -> Day

The day component of a date value.

#weekday 

weekday :: Date -> Weekday

The weekday for a date value.

#diff 

diff :: forall d. Duration d => Date -> Date -> d

Calculates the difference between two dates, returning the result as a duration.

#isLeapYear 

isLeapYear :: Year -> Boolean

Checks whether a year is a leap year according to the proleptic Gregorian calendar.

#lastDayOfMonth 

lastDayOfMonth :: Year -> Month -> Day

Get the final day of a month and year, accounting for leap years.

#adjust 

adjust :: Days -> Date -> Maybe Date

Adjusts a date with a Duration in days. The number of days must already be an integer and fall within the valid range of values for the Int type.

Re-exports from Data.Date.Component

#Year 

newtype Year

A year component for a date.

The constructor is private as the Year type is bounded to the range -271820 to 275759, inclusive. The toEnum function can be used to safely acquire a year value from an integer.

Instances

#Weekday 

data Weekday

A type representing the days of the week in the Gregorian calendar.

Constructors

Instances

#Month 

data Month

A month component for a date in the Gregorian calendar.

Constructors

Instances

#Day 

newtype Day

A day component for a date.

The constructor is private as the Day type is bounded to the range 1 to 31, inclusive. The toEnum function can be used to safely acquire a day value from an integer.

Instances

Modules