 
   ## Examples
 
-    * If, in your Calendar, a new day starts at midnight, return {0, 1}.
-    * If, in your Calendar, a new day starts at sunrise, return {1, 4}.
-    * If, in your Calendar, a new day starts at noon, return {1, 2}.
-    * If, in your Calendar, a new day starts at sunset, return {3, 4}.
+    * If in your calendar a new day starts at midnight, return `{0, 1}`.
+    * If in your calendar a new day starts at sunrise, return `{1, 4}`.
+    * If in your calendar a new day starts at noon, return `{1, 2}`.
+    * If in your calendar a new day starts at sunset, return `{3, 4}`.
 
   """
   @callback day_rollover_relative_to_midnight_utc() :: day_fraction

  The internal date format that is used when converting between calendars.

  This is the number of days including the fractional part that has passed of
  the last day since 0000-01-01+00:00T00:00.000000 in ISO 8601 notation (also
  known as midnight 1 January BC 1 of the proleptic Gregorian calendar).
  """
  @type iso_days :: {days :: integer, day_fraction}


  @type time_zone_database :: module()

  @doc """
  Returns how many days there are in the given month of the given year.
  """
  @callback days_in_month(year, month) :: day

