diff --git a/reference/intl/dateformatter/settimezone.xml b/reference/intl/dateformatter/settimezone.xml
index 0558bd154e..1cd28b869c 100644
--- a/reference/intl/dateformatter/settimezone.xml
+++ b/reference/intl/dateformatter/settimezone.xml
@@ -5,7 +5,7 @@
  <refnamediv>
   <refname>IntlDateFormatter::setTimeZone</refname>
   <refname>datefmt_set_timezone</refname>
-  <refpurpose>Sets formatter's timezone</refpurpose>
+  <refpurpose>Sets formatterʼs timezone</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -28,7 +28,10 @@
    <methodparam><type>mixed</type><parameter>zone</parameter></methodparam>
   </methodsynopsis>
 
-  &warn.undocumented.func;
+  <para>
+   Sets the timezone that will be used when formatting dates or times with this
+   object.
+  </para>
 
  </refsect1>
 
@@ -39,8 +42,36 @@
     <term><parameter>zone</parameter></term>
     <listitem>
      <para>
-      
+      The timezone to use for this formatter. This can be specified in the
+      following forms:
      </para>
+     <itemizedlist>
+      <listitem>
+       <para>
+        &null;, in which case the default timezone will be used, as specified in
+        the ini setting <link linkend="ini.date.timezone">date.timezone</link>.
+       </para>
+      </listitem>
+      <listitem>
+       <para>
+        An <classname>IntlTimeZone</classname>, which will be used directly.
+       </para>
+      </listitem>
+      <listitem>
+       <para>
+        A <classname>DateTimeZone</classname>. Its identifier will be extracted
+        and an ICU timezone object will be created; the timezone will be backed
+        by ICUʼs database, not PHPʼs.
+       </para>
+      </listitem>
+      <listitem>
+       <para>
+        A <type>string</type>, which should be a valid ICU timezone identifier.
+        See <function>IntlTimeZone::createTimeZoneIDEnumeration</function>. Raw
+        offsets such as <literal>"GMT+08:30"</literal> are also accepted.
+       </para>
+      </listitem>
+     </itemizedlist>
     </listitem>
    </varlistentry>
   </variablelist>
@@ -49,11 +80,74 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-
+   Returns &true; on success and &false; on failure.
   </para>
  </refsect1>
 
 
+ <refsect1 role="examples">
+  &reftitle.examples;
+  <para>
+   <example>
+   <title><function>IntlDateFormatter::setTimeZone</function> examples</title>
+    <programlisting role="php">
+<![CDATA[
+<?php
+ini_set('date.timezone', 'Europe/Amsterdam');
+
+$formatter = IntlDateFormatter::create(NULL, NULL, NULL, "UTC");
+
+$formatter->setTimeZone(NULL);
+echo "NULL\n\t", $formatter->getTimeZone()->getId(), "\n";
+
+$formatter->setTimeZone(IntlTimeZone::createTimeZone('Europe/Lisbon'));
+echo "IntlTimeZone\n\t", $formatter->getTimeZone()->getId(), "\n";
+
+$formatter->setTimeZone(new DateTimeZone('Europe/Paris'));
+echo "DateTimeZone\n\t", $formatter->getTimeZone()->getId(), "\n";
+
+$formatter->setTimeZone('Europe/Rome');
+echo "String\n\t", $formatter->getTimeZone()->getId(), "\n";
+
+$formatter->setTimeZone('GMT+00:30');
+print_r($formatter->getTimeZone());
+
+]]>
+    </programlisting>
+    &example.outputs;
+    <screen>
+<![CDATA[
+NULL
+	Europe/Amsterdam
+IntlTimeZone
+	Europe/Lisbon
+DateTimeZone
+	Europe/Paris
+String
+	Europe/Rome
+IntlTimeZone Object
+(
+    [valid] => 1
+    [id] => GMT+00:30
+    [rawOffset] => 1800000
+    [currentOffset] => 1800000
+)
+
+]]>
+    </screen>
+   </example>
+  </para>
+ </refsect1>
+
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <para>
+   <simplelist>
+    <member><function>IntlDateFormatter::getTimeZone</function></member>
+   </simplelist>
+  </para>
+ </refsect1>
+
 </refentry>
 
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