diff --git a/reference/datetime/datetime.xml b/reference/datetime/datetime.xml
index 88e4604202..df8cc18efb 100644
--- a/reference/datetime/datetime.xml
+++ b/reference/datetime/datetime.xml
@@ -45,7 +45,7 @@
      <modifier>const</modifier>
      <type>string</type>
      <varname linkend="datetime.constants.cookie">DateTime::COOKIE</varname>
-     <initializer>"l, d-M-y H:i:s T"</initializer>
+     <initializer>"l, d-M-Y H:i:s T"</initializer>
     </fieldsynopsis>
     <fieldsynopsis>
      <modifier>const</modifier>
@@ -141,7 +141,7 @@
      <term><constant>DATE_COOKIE</constant></term>
      <listitem>
       <simpara>
-       HTTP Cookies (example: Monday, 15-Aug-05 15:52:01 UTC)
+       HTTP Cookies (example: Monday, 15-Aug-2005 15:52:01 UTC)
       </simpara>
      </listitem>
     </varlistentry>
@@ -259,6 +259,13 @@
         The class now implements <classname>DateTimeInterface</classname>.
        </entry>
       </row>
+      <row>
+       <entry>5.4.24</entry>
+       <entry>
+        The COOKIE constant was changed to reflect RFC 1036 using a four digit 
+        year rather than a two digit year (RFC 850) as prior versions.
+       </entry>
+      </row>
       <row>
        <entry>5.2.2</entry>
        <entry>