You can change the format of all dates shown throughout the theme (with the exception of individual comments) by modifying your config.json file in the Micro.blog Dashboard theme editor. Here’s an example config.json with modifications:

{
    "paginate": 20,
    "defaultContentLanguage": "it",
    "params": {
         "dateFormatLong": "2 January 2006",
         "dateFormatShort": "2 Jan 2006"
    }
}

Going line by line, you can see the number of posts before it breaks into pages is set as 20. The next line sets the language of the site to Italian (see possible options for language). The last section allows you to define the format of short and long dates throughout the theme. Inputting any commonly used format will work. You can use this as a guide.