Temporal reached Stage 4

[...] Temporal reached Stage 4 in the TC39 staging process, which means it will be part of the next annual ECMAScript specification (ES2026). However, you don't need to wait until then - you can use it today!

Temporal is already supported across:

• Firefox v139 (since May 2025)
• Chrome v144 (since January 2026)
• Edge v144 (since January 2026)
• TypeScript 6.0 Beta (since February 2026)
• Safari (Partial Support in Technology Preview)
• Node.js v26 (TBC)

[bloomberg.github.io/js-blog/post/temporal]

Though, according to the list of finished proposals, temporal will not be part of ES2026 but of ES2027. The expected publication year was specifically updated to 2027.

Resources:

• developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Temporal
• caniuse.com/temporal
• github.com/tc39/proposal-temporal
  • github.com/tc39/proposal-temporal/commit/06d3e081706ed2adef95b7e9dbb5b6e6f5e638a2