code: function moveEvents(events, dayDelta, minuteDelta, allDay) {
  		minuteDelta = minuteDelta || 0;
  		for (var e, len=events.length, i=0; i<len; i++) {
  			e = events[i];
  			if (allDay !== undefined) {
  				e.allDay = allDay;
  			}
  			addMinutes(addDays(e.start, dayDelta, true), minuteDelta);
  			if (e.end) {
  				e.end = addMinutes(addDays(e.end, dayDelta, true), minuteDelta);
  			}
  			normalizeEvent(e, options);
  		}
  	}
docs: /* Event Modification Math
  ---------------------------------------------------------------------------------