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+PR_NormalizeTime
+================
+
+Adjusts the fields of a clock/calendar time to their proper ranges,
+using a callback function.
+
+
+Syntax
+------
+
+.. code::
+
+   #include <prtime.h>
+
+   void PR_NormalizeTime (
+     PRExplodedTime *time,
+     PRTimeParamFn params);
+
+
+Parameters
+~~~~~~~~~~
+
+The function has these parameters:
+
+``time``
+   A pointer to a clock/calendar time in the :ref:`PRExplodedTime` format.
+``params``
+   A time parameter callback function.
+
+
+Returns
+~~~~~~~
+
+Nothing; the ``time`` parameter is altered by the callback function.
+
+
+Description
+-----------
+
+This function adjusts the fields of the specified time structure using
+the specified time parameter callback function, so that they are in the
+proper range.
+
+Call this function in these situations:
+
+-  To normalize a time after performing arithmetic operations directly
+   on the field values of the calendar time object. For example, if you
+   have a ``]`` object that represents the date 3 March 1998 and you
+   want to say "forty days from 3 March 1998", you can simply add 40 to
+   the ``tm_mday`` field and then call ``PR_NormalizeTime()``.
+
+-  To calculate the optional field values ``tm_wday`` and ``tm_yday``.
+   For example, suppose you want to compute the day of week for 3 March
+   1998. You can set ``tm_mday`` to 3, ``tm_month`` to 2, and
+   ``tm_year`` to 1998, and all the other fields to 0, then call
+   ``PR_NormalizeTime()`` with :ref:`PR_GMTParameters`. On return,
+   ``tm_wday`` (and ``tm_yday``) are set for you.
+
+-  To convert from one time zone to another. For example, if the input
+   argument time is in time zone A and the input argument ``params``
+   represents time zone B, when ``PR_NormalizeTime()`` returns, time
+   will be in time zone B.