<p dir="auto">deno: 0.2.8<br>
v8: 7.2.502.16<br>
typescript: 3.2.1</p>
<p dir="auto">Run the following in both node and deno:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;America/Halifax&quot;});
new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;America/New_York&quot;});
new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;America/Chicago&quot;});
new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;America/Denver&quot;});
new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;America/Los_Angeles&quot;});
new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;America/Anchorage&quot;});
new Date().toLocaleString(&quot;en-US&quot;, {timeZone: &quot;Pacific/Honolulu&quot;});"><pre class="notranslate"><code class="notranslate">new Date().toLocaleString("en-US", {timeZone: "America/Halifax"});
new Date().toLocaleString("en-US", {timeZone: "America/New_York"});
new Date().toLocaleString("en-US", {timeZone: "America/Chicago"});
new Date().toLocaleString("en-US", {timeZone: "America/Denver"});
new Date().toLocaleString("en-US", {timeZone: "America/Los_Angeles"});
new Date().toLocaleString("en-US", {timeZone: "America/Anchorage"});
new Date().toLocaleString("en-US", {timeZone: "Pacific/Honolulu"});
</code></pre></div>
<p dir="auto">Deno returns incorrect times. It doesn't appear to support the <a href="https://www.iana.org/time-zones" rel="nofollow">IANA</a> time zones yet.</p>
<p dir="auto">As seen in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="422116599" data-permission-text="Title is private" data-url="https://github.com/denoland/deno/issues/1952" data-hovercard-type="issue" data-hovercard-url="/denoland/deno/issues/1952/hovercard" href="https://github.com/denoland/deno/issues/1952">#1952</a> / <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="405562913" data-permission-text="Title is private" data-url="https://github.com/denoland/deno/issues/1636" data-hovercard-type="issue" data-hovercard-url="/denoland/deno/issues/1636/hovercard" href="https://github.com/denoland/deno/issues/1636">#1636</a> ICU needs to be added in Deno build.</p>
<p dir="auto">Switching this flag to true maybe: <a href="https://github.com/denoland/deno/blob/master/.gn#L50">https://github.com/denoland/deno/blob/master/.gn#L50</a> ?</p>
<p dir="auto">ref: <a href="https://v8.dev/docs/i18n" rel="nofollow">https://v8.dev/docs/i18n</a></p>