Post dates and times should be wrapped in HTML5 time tags. It's simply more semantically correct, and better parseable for search engines too.

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/time

https://stackoverflow.com/questions/6852866/what-s-the-point-of-using-the-html5-time-tag

It would also make it easier to implement some JS code to customize date formatting client-side, like using moment.js through an extension.