Date is out, Temporal is in

Graphic with headline “Date is out, Temporal is in”. Footer text reads “Piccalilli from set.studio” and “Mat ‘Wilto’ Marquis — 07 January 2026”, alongside a circular portrait.

Mat Marquis breaks down why JavaScript’s Date is inconsistent and bug-prone, then tours Temporal, a Stage 3 TC39 proposal with date-only types, time zones, and add/subtract that returns new objects. Temporal is now supported in recent Chrome and Firefox releases, but the spec can still evolve.

piccalil.li/blog/date-is-out-and-temporal-is-in