type MonthOfYear = Int Source

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

pattern January :: MonthOfYear Source

pattern February :: MonthOfYear Source

pattern March :: MonthOfYear Source

pattern April :: MonthOfYear Source

pattern May :: MonthOfYear Source

pattern June :: MonthOfYear Source

pattern July :: MonthOfYear Source

pattern August :: MonthOfYear Source

pattern September :: MonthOfYear Source

pattern October :: MonthOfYear Source

pattern November :: MonthOfYear Source

pattern December :: MonthOfYear Source

The twelve MonthOfYear patterns form a COMPLETE set.

type DayOfMonth = Int Source

Day of month, in range 1 to 31.

type DayOfYear = Int Source

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 Source

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 Source

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) Source

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

monthLength :: Bool -> MonthOfYear -> DayOfMonth Source

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