Helpers for working with elm/lang's Posix data type (Mostly copied from https://package.elm-lang.org/packages/rluiten/elm-TimeUtils)
daysInMonth : Basics.Int -> Time.Month -> Basics.Int
Return days in month for year and month.
isLeapYear : Basics.Int -> Basics.Bool
Return True
if year is a leap year.
isoDayOfWeek : Time.Weekday -> Basics.Int
Return the ISO day of the week. From Monday == 1, to Sunday == 7.
monthToInt : Time.Month -> Basics.Int
Return the ISO number of each month [1-12].
utcDateTime : Time.Posix -> String
utcWeek : Time.Posix -> String