Data.Time.Calendar.MonthDay

Documentation

type MonthOfYear = Int

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

type DayOfMonth = Int

Day of month, in range 1 to 31.

type DayOfYear = Int

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

monthAndDayToDayOfYear :: Bool -> MonthOfYear -> DayOfMonth -> DayOfYear

Convert month and day in the Gregorian or Julian calendars to day of year. First arg is leap year flag.

monthAndDayToDayOfYearValid :: Bool -> MonthOfYear -> DayOfMonth -> Maybe DayOfYear

Convert month and day in the Gregorian or Julian calendars to day of year. First arg is leap year flag.

dayOfYearToMonthAndDay :: Bool -> DayOfYear -> (MonthOfYear, DayOfMonth)

Convert day of year in the Gregorian or Julian calendars to month and day. First arg is leap year flag.

monthLength :: Bool -> MonthOfYear -> DayOfMonth

The length of a given month in the Gregorian or Julian calendars. First arg is leap year flag.