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diff --git a/user_guide_src/source/installation/upgrade_313.rst b/user_guide_src/source/installation/upgrade_313.rst
index 71afc6f6a..ebce7ab9b 100644
--- a/user_guide_src/source/installation/upgrade_313.rst
+++ b/user_guide_src/source/installation/upgrade_313.rst
@@ -12,3 +12,21 @@ Replace all files and directories in your *system/* directory.
.. note:: If you have any custom developed files in these directories,
please make copies of them first.
+
+Step 2: Remove usage of nice_date() helper (deprecation)
+========================================================
+
+The :doc:`Date Helper <../helpers/date_helper>` function ``nice_date()`` is
+no longer useful since the introduction of PHP's `DateTime classes
+<https://secure.php.net/datetime>`_
+
+You can replace it with the following:
+::
+
+ DateTime::createFromFormat($input_format, $input_date)->format($desired_output_format);
+
+Thus, ``nice_date()`` is now deprecated and scheduled for removal in
+CodeIgniter 3.2+.
+
+.. note:: The function is still available, but you're strongly encouraged
+ to remove its usage sooner rather than later.