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/temporal/

March 11, 2026 - 15:21 UTC

20
16
345
yas! thanks a ton for all your work Jason, and for everyone that was involved during the long years that led to this moment! this will probably be the biggest JS milestone for a long time 👏
0
0
6
It was about time! 🥁
1
0
15
On a more serious note: congrats to all involved. Massive achievement! 👏
0
0
6
Huuuuuge kudos and congratulations!
0
0
3
congrats!!!!! this is great <3
0
0
3
🥳
0
0
1
hopefully no temporaldate.wtf site pops up in a few decades
1
0
10
with an average score of 90+% :)
0
0
8
huge kudos to everyone who worked on this! Time is such a thankless thing to work on - complex and full of pitfalls, but everyone thinks it *ought* to be simple. (How many management types, or even devs who aren't familiar with time, asked "why tf do we need to spend *this* much effort on it?!?")
1
0
3
and contrary to what you suggest in the blog, Moment was far from a de-facto standard. there's a rich ecosystem of libraries for working with time - and it isn't the sort of thing that yearns for a rich ecosystem.

having one built-in system that *actually works* is fucking HUGE!
1
0
3
Congratulations!
0
0
2
Thanks for shouting out my silly little quiz 🫶
1
0
5
Again!
0
0
3
Yesssss. Great work all! 👏
0
0
2
So amazing
0
0
5
Niceeee!
0
0
1
rip the js Date object. gonna take a while to get the models to stop hallucinating moment.js imports but i am so ready for this.
0
0
0
Absolutely great job. We discussed this after your talk on 28 Feb. I’m going to investigate whether I can tree shake it to provide “just enough” functionality to support a date picker in browsers that lack Temporal (ie Safari).
1
0
2
Hello! I'm the author of this polyfill and plan on creating a tree-shakeable API (bottom of www.npmjs.com/package/temporal-polyfill)
2
0
5
About time!
0
0
3
Massive congrats to all involved! I know this was a long time coming.
0
0
5
Finally, couldn't wait for it being done! 🎉
0
0
4
That will be such an improvement for so many apps 🎉
0
0
2
Congratulations and thank you very much for this!
0
0
2
Love the blog post! And congratulations! I was happy to have played a small part in stage 0-1. Thanks for going the distance!
0
0
5