sample-edit.js

    save: function() {
      // Update the item
      var dateString = this.get('dateString'),
          hour = this.get('hour'),
          minute = this.get('minute'),
          period = this.get('period'),
          timezone = this.get('timezone'),
          item = this.get('item');
      // Let's convert the hour back to 24-hour format...
      if (period === 'am' && hour === 12) {
        hour = 0;
      } else if (period === 'pm') {
        if (hour !== 12) {
          hour += 12;
        }
      }
      var self = this,
          url = config.apiURL + 'app/item/edit',
          data = {
            item_id: item.blobId,
            date: dateString,
            hour: hour,
            minute: minute,
            timezone: timezone
          };
      return Ember.$.ajax({
        url: url,
        type: 'POST',
        data: data
      });
    }

what format should be the dateString?