- List has attribute with unix timestamp. I think It's date when it was created.
- Declined by admin
- If conflicting dates are stored in multiple places on the source page, preference should be given to the time that is visible to the ordinary user who views the page in a browser:
- Type of issue
- IV page is missing essential content
- Jun 15, 2017
On pages where there's a visible date, the date from ld+json data matches the visible one.
And in any case it's more, um, "visible", since search engines can use it, for example.