Override dates in a Ghost theme

override-dates.js

$(document).ready(function () {
    var $dates = $('.post-date');

    $dates.each(function (i, date) {
        var $date = $(date),
            newDate = moment($date.attr('datetime')).tz('Europe/London').format('DD MMMM YYYY HH:mm');

        $date.html(newDate);
    });
});