code: function _handleDateFocus(oEvent){
  
  		var oFocusedDate = new UniversalDate(this._getFocusedDate().getTime());
  		var oDate = CalendarUtils._createUniversalUTCDate(oEvent.getParameter("date"), undefined, true);
  		var bNotVisible = oEvent.getParameter("otherMonth");
  
  		if (bNotVisible &&
  				oDate.getUTCMonth() == oFocusedDate.getUTCMonth() &&
  				oDate.getUTCFullYear() == oFocusedDate.getUTCFullYear()) {
  			// only show days in the same month
  			// set start date and focus date
  			_setDateInDatesRow.call(this, oDate);
  		}
  
  	}
docs: Handles day focus from the embedded day Picker.
  This function assumes there is a "datesRow" aggregation.
  So callers must take care.
  @return {void}
  @private