See https://github.com/tc39/proposal-temporal/pull/1645. In the July 2021 meeting TC39 achieved consensus to rename Temporal.now to Temporal.Now since it is a namespace.
Created attachment 434664 [details] Patch
Comment on attachment 434664 [details] Patch r=me
Committed r280506 (240138@main): <https://commits.webkit.org/240138@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 434664 [details].
<rdar://problem/81351731>