Ghost/core/client/helpers/index.js

/*globals Handlebars, moment
*/
(function () {
    'use strict';
    Handlebars.registerHelper('date', function (context, block) {
        var f = block.hash.format || 'MMM Do, YYYY',
            timeago = block.hash.timeago,
            date;
        if (timeago) {
            date = moment(context).fromNow();
        } else {
            date = moment(context).format(f);
        }
        return date;
    });
}());