WP-API - List posts: `before` and `after` doesn't seem to support true ISO 8601

[LaustDeleuran]

Originally posted on WP-API's GitHub - ​https://github.com/WP-API/WP-API/issues/2933. Reposting here as [requested by Edwin Cromley](​https://github.com/BE-Webdesign).

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Opening this endpoint:

​http://demo.wp-api.org/wp-json/wp/v2/posts?before=2016-11-29

Tells me that The date you provided is invalid.. However, I _am_ providing a [ISO 8601 compliant](​https://en.wikipedia.org/wiki/ISO_8601) date, as [according to](​https://cl.ly/3p2G3D3f2e1T) the [documentation](​http://v2.wp-api.org/reference/posts/).

It looks like providing a full date (with time), makes the endpoint work as expected:

​http://demo.wp-api.org/wp-json/wp/v2/posts?before=2016-11-29T00:00:00Z

Maybe the documentation needs to be updated to reflect that?

[LaustDeleuran]

Duplicate of #38641.

Looks like this is a duplicate of https://core.trac.wordpress.org/ticket/38641

[jnylen0]

Hi @LaustDeleuran - I agree that #38641 is the right place to track this, but one angle that is not covered there is that ​our documentation implies full ISO8601 compliance.

Would you mind leaving a comment over there to that effect? This will help us prioritize this issue as it's currently labeled as an enhancement without any mention of the incorrect docs.

[LaustDeleuran]

@jnylen0 didnt get any notifications about this issue, so forgot about it, but just ran into it again on another project. Reposting the details from this on #38641 as you suggested.