Use easily recognizable date format

Thanks for a fast and positive reply @greggles.

Some of Drupal's date formats were actually set to use the ISO-8601 standard in 2004 (Drupal 4.5.0) by Dries, but they must have been lost somewhere along the way ...

Maybe we should update Drupal core instead, and then perhaps it will also fix Security Review's date format? It looks like it might be using a Drupal core date format:

$ grep -iR "Review results from last run" .
./templates/run_and_review.html.twig:    Review results from last run {{ date }}

I have updated the Issue Summary, and moved it to Drupal core instead.

And about this:

Is there a reference page on drupal.org about formatting dates?

I am not sure, but it would be great to have one, if only just stating that the date format in the ISO-8601 standard should be followed in Drupal.

I tried updating the date formats and tests, maybe some more tests need to be updated? Let's see!

Actually, ISO 8601 doesn't cover month names (jan, feb, etc.) so this issue aims at switching to a rapidly recognizable date format, the same as drupal.org issues uses:

Created: 7 Aug 2024 at 11:24 CEST

So updating the title.

Yes @smustgrave, I realized that the right method was to update all the dates :-)

And by the way, let me just repeat that I am eternally grateful that you started and lead the Needs Review Queue Initiative initiative. In my opinion, it's among the most important initiatives, together with Drupal Starshot.

Adding "7th of August" in issue summary to clarify why "08/07/2024" can be opaque.

Thanks for looking at this @catch and @Gábor Hojtsy.

I noticed that there is no comma in the recommended format on Wikipedia, and found few more sources with the same format. So I updated the MR, and removed the comma. I also updated the Olivero date format, which also had a few extra spaces.

I have created the documentation page Date formats under "Coding standards", since I couldn't find a page dedicated to this subject ...

Perhaps someone can review it, and add it to the menu, or place it somewhere else, if it doesn't belong in that section? Thanks!

Thanks everyone for fast feedback and roll-out! It's impressive that this improvement went from idea to completion in less than a week, and already see it in effect in lists under "Content" and "Recent log messages", and node edit under "Last saved".

I created a follow up issue #3467829: Use ISO 8601 format in Authored on field date picker.

@greggles:

Is there a reference page on drupal.org about formatting dates?

It doesn't look like there is, so I have created #3467914: Define a standard for Date formats.

I just created a related issue.