Data.Duration

Documentation

type Duration = DateTime -> DateTime

data Days

Used as values for toDuration

Constructors

Day

Week

Month

Year

Instances

Eq Days

Ord Days

Show Days

toDuration :: Integer -> Days -> Duration

Creates a duration for the number of periods of days specified

fixTime :: DateTime -> Int -> DateTime

Increments a DateTime to be on the weekday (0-6) given

zellerCongruence :: Integer -> Int -> Int -> Integer

Given year, month and day, gives the (0 based) day of the week

assemble :: DateTime -> Duration -> Maybe Duration -> [DateTime]

Creates a list of DateTimes given a start date, an interval duration, and an end duration from the start date

addDays :: Integer -> DateTime -> DateTime

addWeeks :: Integer -> DateTime -> DateTime

addMonths :: Integer -> DateTime -> DateTime

addYears :: Integer -> DateTime -> DateTime