monthAndDayToDayOfYear :: Bool -> Int -> Int -> Int Source

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

monthAndDayToDayOfYearValid :: Bool -> Int -> Int -> Maybe Int Source

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

dayOfYearToMonthAndDay :: Bool -> Int -> (Int, Int) Source

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

monthLength :: Bool -> Int -> Int Source

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