diff --git a/index.html b/index.html
index 577417e..07ed944 100644
--- a/index.html
+++ b/index.html
@@ -31,8 +31,11 @@
       <br />
       <span class="js-my-dt">YYYY-MM-DDThh:mm:ss.mmm+0000</span>
     </h3>
+    <pre><code>new Intl.DateTimeFormat().resolvedOptions().timeZone;</code></pre>
     Current Time Zone: <span class="js-my-tz">America/XXXX</span>
     <br />
+    <pre><code>String(((new Date()).getTimezoneOffset() / 60)).padStart(2, '0') +
+String(((new Date()).getTimezoneOffset() % 60)).padStart(2, '0')</code></pre>
     Current Time Offset: <span class="js-my-offset">-0000</span>
     <hr />