A couple of simple Handlebar helpers to format dates using Moment.js

handlerbars-momentjs-helpers.js

(function (Handlebars, moment) {
    "use strict";

    /**
     * Format an ISO date using Moment.js
     * http://momentjs.com/
     * moment syntax example: moment(Date("2013-03-30T19:45:23")).format("MMMM YYYY")
     * usage: {{dateFormat somedate format="MMMM YYYY"}}
     */
    Handlebars.registerHelper('dateFormat', function (context, block) {
        var date = context;
        if (moment) {
            date = moment(new Date(context)).format(block.hash.format || "MMM Do, YYYY");
        }

        return date;
    });

    /**
     * Format an ISO date into calendar time using Moment.js
     * http://momentjs.com/
     * moment syntax example: moment(Date("2013-03-30T19:45:23")).calendar();
     * usage: {{calendarTime somedate}}
     */
    Handlebars.registerHelper('calendarTime', function (context) {
        var date = context;
        if (moment) {
            date = moment(new Date(context)).calendar();
        }

        return date;
    });

}(Handlebars, moment));