Please, consider iso-8601 formatted dates in bare html

Currently, the dates look like this:


Which is convenient for people, but not so much for machines.

Please, consider using iso-8601 for dates `2023-05-11T10:00` in bare html, which can be then easitly converted to any format with JavaScript on the user end.

This way the original html will be machine-friendly, while still being human-readable (unlike Epoch timestamps), and the end-user would be even able to customise the dates to their liking in JS.

No file or test is named in the issue. Locate the template or renderer that emits dates in bare HTML, then inspect any existing date-rendering tests or examples. Done means the generated date values use the requested ISO-8601 form, such as `2023-05-11T10:00`, while remaining suitable for human-readable display.

Written by the indexing model from the issue text.