Specs

date_to_string(year(), month(), day()) :: String.t()

Converts the date into a string according to the calendar.

Converts the datetime (with time zone) into a string according to the calendar.

Specs

day_of_era(year(), month(), day()) :: {day :: pos_integer(), era :: 0..1}

Calculates the day and era from the given year, month, and day.

Specs

day_of_week(year(), month(), day()) :: day_of_week()

Calculates the day of the week from the given year, month, and day.

Specs

day_of_year(year(), month(), day()) :: 1..366

Calculates the day of the year from the given year, month, and day.

Define the rollover moment for the given calendar.

Specs

days_in_month(Calendar.year(), Calendar.month()) :: Calendar.day()

Returns how many days there are in the given year-month.

Specs

leap_year?(Calendar.year()) :: boolean()

Returns true if the given year is a leap year.

Specs

months_in_year(year()) :: 5

Returns how many months there are in the given year.

Specs

naive_datetime_from_iso_days(Calendar.iso_days()) ::
  {Calendar.year(), Calendar.month(), Calendar.day(), Calendar.hour(),
   Calendar.minute(), Calendar.second(), Calendar.microsecond()}

Converts iso_days/0 to the Calendar's datetime format.

Specs

naive_datetime_to_iso_days(
  Calendar.year(),
  Calendar.month(),
  Calendar.day(),
  Calendar.hour(),
  Calendar.minute(),
  Calendar.second(),
  Calendar.microsecond()
) :: Calendar.iso_days()

Converts the given datetime (without time zone) into the iso_days/0 format.

Specs

naive_datetime_to_string(
  year(),
  month(),
  day(),
  hour(),
  minute(),
  second(),
  microsecond()
) :: String.t()

Converts the datetime (without time zone) into a string according to the calendar.

Parses the string representation for a date returned by date_to_string/3 into a date-tuple.

Parses the string representation for a naive datetime returned by naive_datetime_to_string/7 into a naive-datetime-tuple.

Parses the string representation for a time returned by time_to_string/4 into a time-tuple.

Parses the string representation for a datetime returned by datetime_to_string/11 into a datetime-tuple.

Specs

quarter_of_year(year(), month(), day()) :: 1..4

Calculates the quarter of the year from the given year, month, and day.

Specs

time_from_day_fraction(Calendar.day_fraction()) ::
  {Calendar.hour(), Calendar.minute(), Calendar.second(),
   Calendar.microsecond()}

Converts day_fraction/0 to the Calendar's time format.

Specs

time_to_day_fraction(
  Calendar.hour(),
  Calendar.minute(),
  Calendar.second(),
  Calendar.microsecond()
) :: Calendar.day_fraction()

Converts the given time to the day_fraction/0 format.

Converts the time into a string according to the calendar.

Should return true if the given date describes a proper date in the calendar.

Should return true if the given time describes a proper time in the calendar.

Specs

year_of_era(year()) :: {year(), era :: 0..1}

Calculates the year and era from the given year.