You can modify the line with $w("#text97").text to choose how you want it to show the date, currently it's showing it this: June 19, 2020
Also, you need to add a text element to the post page, put it where you want the date to show up and find out the text elements' name by hovering over it and writing it down into the "$w("#text97").text" field, as you can see mine was #text97:
The code also works only in preview and live, it won't show the result in the editor.
Hope this helps!
If you have any more questions, be sure to reply to me!
Hello @Maïlys Joscht,
I'll add your vote to our feature wish list to be able to control the format of the Published date.
The workaround I can offer you now is to add a special code on your post page that will write the date on top of the post page in any format you want.
If this solution interests you, be sure to reply and I'll show you the code to add it to your site or do it for you.