Data.Time.Calendar.Julian · time-1.12.2

typetype Year = Integer

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Year of Common Era (when positive).

typetype MonthOfYear = Int

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Month of year, in range 1 (January) to 12 (December).

patternpattern January :: MonthOfYear

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patternpattern February :: MonthOfYear

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patternpattern March :: MonthOfYear

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patternpattern April :: MonthOfYear

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patternpattern May :: MonthOfYear

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patternpattern June :: MonthOfYear

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patternpattern July :: MonthOfYear

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patternpattern August :: MonthOfYear

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patternpattern September :: MonthOfYear

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patternpattern October :: MonthOfYear

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patternpattern November :: MonthOfYear

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patternpattern December :: MonthOfYear

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The twelve MonthOfYear patterns form a COMPLETE set.

typetype DayOfMonth = Int

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Day of month, in range 1 to 31.

typetype DayOfYear = Int

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Day of year, in range 1 (January 1st) to 366. December 31st is 365 in a common year, 366 in a leap year.

valuetoJulianYearAndDay :: Day -> (Year, DayOfYear)

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Convert to proleptic Julian year and day format.

valueisJulianLeapYear :: Year -> Bool

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

valuefromJulianYearAndDay :: Year -> DayOfYear -> Day

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Convert from proleptic Julian year and day format. Invalid day numbers will be clipped to the correct range (1 to 365 or 366).

valuefromJulianYearAndDayValid :: Year -> DayOfYear -> Maybe Day

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Convert from proleptic Julian year and day format. Invalid day numbers will return Nothing

valueshowJulianYearAndDay :: Day -> String

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Show in proleptic Julian year and day format (yyyy-ddd)

valuetoJulian :: Day -> (Year, MonthOfYear, DayOfMonth)

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Convert to proleptic Julian calendar.

valuefromJulian :: Year -> MonthOfYear -> DayOfMonth -> Day

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Convert from proleptic Julian calendar. Invalid values will be clipped to the correct range, month first, then day.

patternpattern JulianYearMonthDay :: Year -> MonthOfYear -> DayOfMonth -> Day

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Bidirectional abstract constructor for the proleptic Julian calendar. Invalid values will be clipped to the correct range, month first, then day.

valuefromJulianValid :: Year -> MonthOfYear -> DayOfMonth -> Maybe Day

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Convert from proleptic Julian calendar. Invalid values will return Nothing.

valueshowJulian :: Day -> String

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

valuejulianMonthLength :: Year -> MonthOfYear -> DayOfMonth

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The number of days in a given month according to the proleptic Julian calendar.

valueaddJulianMonthsClip :: Integer -> Day -> Day

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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.

valueaddJulianMonthsRollOver :: Integer -> Day -> Day

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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.

valueaddJulianYearsClip :: Integer -> Day -> Day

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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.

valueaddJulianYearsRollOver :: Integer -> Day -> Day

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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.

valueaddJulianDurationClip :: CalendarDiffDays -> Day -> Day

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Add months (clipped to last day), then add days

valueaddJulianDurationRollOver :: CalendarDiffDays -> Day -> Day

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Add months (rolling over to next month), then add days

valuediffJulianDurationClip :: Day -> Day -> CalendarDiffDays

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Calendrical difference, with as many whole months as possible

valuediffJulianDurationRollOver :: Day -> Day -> CalendarDiffDays

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Calendrical difference, with as many whole months as possible. Same as diffJulianDurationClip for positive durations.