diff --git a/reference/datetime/formats.xml b/reference/datetime/formats.xml
index a89ba70d45..b6c35de338 100644
--- a/reference/datetime/formats.xml
+++ b/reference/datetime/formats.xml
@@ -18,7 +18,7 @@
  </para>
 
  <!--Time Formats: {{{-->
- <section xml:id="datetime.formats.time">
+ <sect1 xml:id="datetime.formats.time">
   <title>Time Formats</title>
   
   <para>
@@ -171,11 +171,11 @@
     </tbody>
    </tgroup>
   </table>
- </section>
+ </sect1>
  <!--}}}-->
 
  <!--Date Formats: {{{-->
- <section xml:id="datetime.formats.date">
+ <sect1 xml:id="datetime.formats.date">
   <title>Date Formats</title>
   
   <para>
@@ -443,11 +443,11 @@
     in the proleptic Gregorian calendar).
    </para>
   </note>
- </section>
+ </sect1>
  <!--}}}-->
 
  <!--Compound Formats: {{{-->
- <section xml:id="datetime.formats.compound">
+ <sect1 xml:id="datetime.formats.compound">
   <title>Compound Formats</title>
 
   <para>
@@ -635,13 +635,12 @@
     The "Unix Timestamp" format sets the timezone to UTC.
    </para>
   </note>
- </section>
+ </sect1>
  <!--}}}-->
 
  <!--Relative Formats: {{{-->
- <section xml:id="datetime.formats.relative">
+ <sect1 xml:id="datetime.formats.relative">
   <title>Relative Formats</title>
-
   <para>
    This page describes the different relative date/time formats that the
    <function>strtotime</function>, <classname>DateTime</classname> and
@@ -926,7 +925,32 @@
     December being 31 days in length, producing a total of 61 days.
    </para>
   </note>
- </section>
+  
+  <sect2 role="changelog">
+   &reftitle.changelog;
+   <para>
+    <informaltable>
+     <tgroup cols="2">
+      <thead>
+       <row>
+        <entry>&Version;</entry>
+        <entry>&Description;</entry>
+       </row>
+      </thead>
+      <tbody>
+       <row>
+        <entry>5.3.3</entry>
+        <entry>
+         "first day" and "last day" changed to behave has "+1 day" and "-1 day",
+         respectively. Previously, the behaviour was as "first day of" and "last day of".
+        </entry>
+       </row>
+      </tbody>
+     </tgroup>
+    </informaltable>
+   </para>
+  </sect2>
+ </sect1>
  <!--}}}-->
 
 </chapter>