You can hard code the change ... in the date.js function date_field_formatter_view, change this line
markup: '<div class="value">' + label + date(format, d.getTime()) + '</div>'
to something like
markup: '<div class="value">' + label + date('D, j F Y - g:i a', d.getTime()) + '</div>'
It at least gets the job done, although I don't like hard coding like this.