You can change the dateformat in the language files to match your desired format.
In some cases you need to put the following in your config file, at least in my experience, when changing the date format:
$CFG->nofixday = true;
You can change the dateformat in the language files to match your desired format.
In some cases you need to put the following in your config file, at least in my experience, when changing the date format: