diff --git a/site/_posts/2012-07-01-configuration.md b/site/_posts/2012-07-01-configuration.md
index bca5dc69a..11cb9dd5a 100644
--- a/site/_posts/2012-07-01-configuration.md
+++ b/site/_posts/2012-07-01-configuration.md
@@ -89,7 +89,8 @@ class="flag">flags</code> (specified on the command-line) that control them.
             shell environment variable, which Ruby uses to handle time and date
             creation and manipulation. Any entry from the
             <a href="http://en.wikipedia.org/wiki/Tz_database">IANA Time Zone
-            Database</a> is valid.
+            Database</a> is valid, e.g. <code>America/New_York</code>. The default
+            is the local time zone, as set by your operating system.
         </p>
       </td>
       <td class='align-center'>