.removeClass( 'mw-widget-calendarWidget-old-body' )
.toggleClass( 'mw-widget-calendarWidget-body-month', this.displayLayer === 'month' )
.toggleClass( 'mw-widget-calendarWidget-body-year', this.displayLayer === 'year' )
.removeClass( 'mw-widget-calendarWidget-old-body' )
.toggleClass( 'mw-widget-calendarWidget-body-month', this.displayLayer === 'month' )
.toggleClass( 'mw-widget-calendarWidget-body-year', this.displayLayer === 'year' )