diff --git a/README.md b/README.md
index ef51439..2987d84 100644
--- a/README.md
+++ b/README.md
@@ -653,6 +653,7 @@ from dateutil.tz import UTC, tzlocal, gettz, resolve_imaginary
 "Thursday, 14th of May '15, 11:39PM UTC+02:00"
 ```
 * **When parsing, `'%z'` also accepts `'±HH:MM'`.**
+* **For abbreviated weekday and month use `'%a'` and `'%b'`.**
 
 ### Arithmetics
 ```python
diff --git a/index.html b/index.html
index 0bc80f6..52f7b27 100644
--- a/index.html
+++ b/index.html
@@ -702,6 +702,7 @@ shuffle(<list>)
 
 <ul>
 <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>
+<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>
 </ul>
 <div><h3 id="arithmetics">Arithmetics</h3><pre><code class="python language-python apache hljs">&lt;D/DT&gt;   = &lt;D/DT&gt; ± &lt;TD&gt;                    <span class="hljs-comment"># Result can fall into missing hour.</span>
 &lt;TD&gt;     = &lt;D/DT&gt; - &lt;D/DT&gt;                  <span class="hljs-comment"># Returns the difference, ignoring time jumps.</span>