[ci skip] Deprecate nice_date()
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index fd3f668..af556a5 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -7,6 +7,10 @@
Release Date: Not Released
+- General Changes
+
+ - Deprecated :doc:`Date Helper <helpers/date_helper>` function :php:func:`nice_date()`.
+
Bug fixes for 3.1.3
-------------------
diff --git a/user_guide_src/source/helpers/date_helper.rst b/user_guide_src/source/helpers/date_helper.rst
index a85da26..600a075 100644
--- a/user_guide_src/source/helpers/date_helper.rst
+++ b/user_guide_src/source/helpers/date_helper.rst
@@ -84,7 +84,7 @@
.. note:: This function is DEPRECATED. Use the native ``date()`` combined with
`DateTime's format constants
- <http://php.net/manual/en/class.datetime.php#datetime.constants.types>`_
+ <https://secure.php.net/manual/en/class.datetime.php#datetime.constants.types>`_
instead::
echo date(DATE_RFC822, time());
@@ -220,6 +220,9 @@
// Should Produce: 2001-09-11
$better_date = nice_date($bad_date, 'Y-m-d');
+ .. note:: This function is DEPRECATED. Use PHP's native `DateTime class
+ <https://secure.php.net/datetime>`_ instead.
+
.. php:function:: timespan([$seconds = 1[, $time = ''[, $units = '']]])
:param int $seconds: Number of seconds
@@ -434,4 +437,4 @@
UP1275 (UTC +12:45) Chatham Islands Standard Time
UP13 (UTC +13:00) Phoenix Islands Time, Tonga
UP14 (UTC +14:00) Line Islands
-=========== =====================================================================
\ No newline at end of file
+=========== =====================================================================
diff --git a/user_guide_src/source/installation/upgrade_313.rst b/user_guide_src/source/installation/upgrade_313.rst
index 71afc6f..ebce7ab 100644
--- a/user_guide_src/source/installation/upgrade_313.rst
+++ b/user_guide_src/source/installation/upgrade_313.rst
@@ -12,3 +12,21 @@
.. note:: If you have any custom developed files in these directories,
please make copies of them first.
+
+Step 2: Remove usage of nice_date() helper (deprecation)
+========================================================
+
+The :doc:`Date Helper <../helpers/date_helper>` function ``nice_date()`` is
+no longer useful since the introduction of PHP's `DateTime classes
+<https://secure.php.net/datetime>`_
+
+You can replace it with the following:
+::
+
+ DateTime::createFromFormat($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.