# ISO Date String to DD/MM/YYYY
  def date_to_dd_mm_yyyy(iso_date) do
    {_, date} = Date.from_iso8601(iso_date)
    {year, month, day} = Date.to_erl(date)

    Integer.to_string(day) <> "/" <> Integer.to_string(month) <> "/" <> Integer.to_string(year)
  end

  # ISO Time String to 12 hour time
  def time_to_12hour(iso_time) do
    {:ok, new_time} = Time.from_iso8601(iso_time)
    {hour, minute, _second} = Time.to_erl(new_time)

    minute_string =
      cond do
        minute < 10 ->
          "0" <> Integer.to_string(minute)
        true ->
          Integer.to_string(minute)
      end

    hour_string =
      cond do
        hour === 0 ->
          "12"
        hour > 12 ->
          Integer.to_string(hour - 12)
        hour <= 12 ->
          Integer.to_string(hour)
      end

    meridiem =
      cond do
        hour >= 12 ->
          "pm"
        hour < 12 ->
          "am"
      end

    hour_string <> ":" <> minute_string <> meridiem
  end