On Tue, 23 Oct 2018 at 16:37, GERRY ASHTON <[log in to unmask]> wrote:
> Wikidata supports both Gregorian and Julian calendars, while
> ISO 8601 and EDTF support only Gregorian. Therefore neither
> ISO 8601 nor EDTF are suitable for Wikidata.
On the contrary; it's perfectly possible to for Wikidata to implement
EDTF for Gregorian dates only.
That said, I would point out that I recommended a calendar property for EDTF:
(though the "features" page referred to in those emails is now 404;
and not in the Wayback Machine).