time-1.6.0.1: A time library

Safe Haskell | Safe
Language | Haskell2010

Data.Time.Calendar

Contents

- Days
- Gregorian calendar

Synopsis

- newtype Day = ModifiedJulianDay {
  - toModifiedJulianDay :: Integer
  }
- addDays :: Integer -> Day -> Day
- diffDays :: Day -> Day -> Integer
- toGregorian :: Day -> (Integer, Int, Int)
- fromGregorian :: Integer -> Int -> Int -> Day
- fromGregorianValid :: Integer -> Int -> Int -> Maybe Day
- showGregorian :: Day -> String
- gregorianMonthLength :: Integer -> Int -> Int
- addGregorianMonthsClip :: Integer -> Day -> Day
- addGregorianMonthsRollOver :: Integer -> Day -> Day
- addGregorianYearsClip :: Integer -> Day -> Day
- addGregorianYearsRollOver :: Integer -> Day -> Day
- isLeapYear :: Integer -> Bool

# 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 (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c Day) Source # dataCast2 :: Typeable (* -> * -> *) 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?