Temporal is now Stage 4 at TC39 🎂🎂🎂
Thanks to all the other champions of JavaScript's new date-time API. It has been a wild ride over many years!
I wrote a blog post explaining how we got here 📜
bloomberg.github.io/js-blog/post...
![Code example showing the usage of Temporal.ZoneddateTime
```js
// London DST starts: 2026-03-29 01:00 -> 02:00
const zdt = Temporal.ZonedDateTime.from(
"2026-03-29T00:30:00+00:00[Europe/London]",
);
console.log(zdt.toString());
// → "2026-03-29T00:30:00+00:00[Europe/London]"
const plus1h = zdt.add({ hours: 1 });
console.log(plus1h.toString());
// "2026-03-29T02:30:00+01:00[Europe/London]" (01:30 doesn't exist)
```](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:r5emt2gkdrkb2yc6y7xndxpe/bafkreicgonzisednk3qegophndqf6fnslwtvbd7gshsgtv6fpi3arh2dsi)
Jason Williams
@jason-williams.co.uk
1.4K followers 201 following 32 posts
JavaScript Infrastructure & Tooling @Bloomberg @TC39, creator of Boa (JS Engine)
