diff --git a/README.md b/README.md
index 34878dc..c48d0d9 100644
--- a/README.md
+++ b/README.md
@@ -605,6 +605,7 @@ from dateutil.tz import UTC, tzlocal, gettz
 "Thursday, 14th of May '15, 11:39PM UTC+02:00"
 ```
 * **For abbreviated weekday and month use `'%a'` and `'%b'`.**
+* **When parsing, `'%z'` also accepts `'±HH:MM'`.**
 
 ### Arithmetics
 ```python
diff --git a/index.html b/index.html
index 1c9f821..6d2b5a7 100644
--- a/index.html
+++ b/index.html
@@ -638,6 +638,7 @@ shuffle(<list>)
 </code></pre>
 <ul>
 <li><strong>For abbreviated weekday and month use <code class="python hljs"><span class="hljs-string">'%a'</span></code> and <code class="python hljs"><span class="hljs-string">'%b'</span></code>.</strong></li>
+<li><strong>When parsing, <code class="python hljs"><span class="hljs-string">'%z'</span></code> also accepts <code class="python hljs"><span class="hljs-string">'±HH:MM'</span></code>.</strong></li>
 </ul>
 <h3 id="arithmetics">Arithmetics</h3>
 <pre><code class="python language-python apache hljs">&lt;D/DT&gt;   = &lt;D/DT&gt; ±  &lt;TD&gt;