Calendar.parse_time

You're seeing just the callback parse_time, go back to Calendar module for more information.
Link to this callback

parse_time(arg1)

View Source (since 1.10.0)

Specs

parse_time(String.t()) ::
  {:ok, {hour(), minute(), second(), microsecond()}} | {:error, atom()}

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