Safe Haskell	Safe
Language	Haskell2010

Data.Time.Calendar

Contents

Days
Gregorian calendar

Synopsis

Days

newtype Day Source

The Modified Julian Day is a standard count of days, with zero being the day 1858-11-17.

Constructors

ModifiedJulianDay
Fields toModifiedJulianDay :: Integer

Instances

Enum Day
Methods succ :: Day -> Day Source pred :: Day -> Day Source toEnum :: Int -> Day Source fromEnum :: Day -> Int Source enumFrom :: Day -> [Day] Source enumFromThen :: Day -> Day -> [Day] Source enumFromTo :: Day -> Day -> [Day] Source enumFromThenTo :: Day -> Day -> Day -> [Day] Source
Eq Day
Methods (==) :: Day -> Day -> Bool (/=) :: Day -> Day -> Bool
Data Day
Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Day -> c Day Source gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Day Source toConstr :: Day -> Constr Source dataTypeOf :: Day -> DataType Source dataCast1 :: Typeable (TYPE Lifted -> TYPE Lifted) t => (forall d. Data d => c (t d)) -> Maybe (c Day) Source dataCast2 :: Typeable (TYPE Lifted -> TYPE Lifted -> TYPE Lifted) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Day) Source gmapT :: (forall b. Data b => b -> b) -> Day -> Day Source gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Day -> r Source gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Day -> r Source gmapQ :: (forall d. Data d => d -> u) -> Day -> [u] Source gmapQi :: Int -> (forall d. Data d => d -> u) -> Day -> u Source gmapM :: Monad m => (forall d. Data d => d -> m d) -> Day -> m Day Source gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Day -> m Day Source gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Day -> m Day Source
Ord Day
Methods compare :: Day -> Day -> Ordering (<) :: Day -> Day -> Bool (<=) :: Day -> Day -> Bool (>) :: Day -> Day -> Bool (>=) :: Day -> Day -> Bool max :: Day -> Day -> Day min :: Day -> Day -> Day
Ix Day
Methods range :: (Day, Day) -> [Day] Source index :: (Day, Day) -> Day -> Int Source unsafeIndex :: (Day, Day) -> Day -> Int inRange :: (Day, Day) -> Day -> Bool Source rangeSize :: (Day, Day) -> Int Source unsafeRangeSize :: (Day, Day) -> Int
NFData Day
Methods rnf :: Day -> () Source
ParseTime Day
Methods buildTime :: TimeLocale -> [(Char, String)] -> Maybe Day Source
FormatTime Day
Methods formatCharacter :: Char -> Maybe (TimeLocale -> Maybe NumericPadOption -> Day -> String) Source

addDays :: Integer -> Day -> Day Source

diffDays :: Day -> Day -> Integer Source

Gregorian calendar

toGregorian :: Day -> (Integer, Int, Int) Source

convert to proleptic Gregorian calendar. First element of result is year, second month number (1-12), third day (1-31).

fromGregorian :: Integer -> Int -> Int -> Day Source

convert from proleptic Gregorian calendar. First argument is year, second month number (1-12), third day (1-31). Invalid values will be clipped to the correct range, month first, then day.

fromGregorianValid :: Integer -> Int -> Int -> Maybe Day Source

convert from proleptic Gregorian calendar. First argument is year, second month number (1-12), third day (1-31). Invalid values will return Nothing

showGregorian :: Day -> String Source

show in ISO 8601 format (yyyy-mm-dd)

gregorianMonthLength :: Integer -> Int -> Int Source

The number of days in a given month according to the proleptic Gregorian calendar. First argument is year, second is month.

addGregorianMonthsClip :: Integer -> Day -> Day Source

Add months, with days past the last day of the month clipped to the last day. For instance, 2005-01-30 + 1 month = 2005-02-28.

addGregorianMonthsRollOver :: Integer -> Day -> Day Source

Add months, with days past the last day of the month rolling over to the next month. For instance, 2005-01-30 + 1 month = 2005-03-02.

addGregorianYearsClip :: Integer -> Day -> Day Source

Add years, matching month and day, with Feb 29th clipped to Feb 28th if necessary. For instance, 2004-02-29 + 2 years = 2006-02-28.

addGregorianYearsRollOver :: Integer -> Day -> Day Source

Add years, matching month and day, with Feb 29th rolled over to Mar 1st if necessary. For instance, 2004-02-29 + 2 years = 2006-03-01.

isLeapYear :: Integer -> Bool Source

Is this year a leap year according to the proleptic Gregorian calendar?