Updated Days View to allow duplicate Weekdays

Author: naomifeehan

src/DaysView.js

@@ -19,7 +19,7 @@ var DateTimePickerDays = React.createClass({
 					DOM.th({ key: 's', className: 'rdtSwitch', onClick: this.props.showView('months'), colSpan: 5, 'data-value': this.props.viewDate.month() }, locale.months( date ) + ' ' + date.year() ),
 					DOM.th({ key: 'n', className: 'rdtNext' }, DOM.button({onClick: this.props.addTime(1, 'months'), type: 'button' }, '›'))
 				]),
-				DOM.tr({ key: 'd'}, this.getDaysOfWeek( locale ).map( function( day ){ return DOM.th({ key: day, className: 'dow'}, day ); }) )
+				DOM.tr({ key: 'd'}, this.getDaysOfWeek( locale ).map( function( day, index ){ return DOM.th({ key: day + index, className: 'dow'}, day ); }) )
 			]),
 			DOM.tbody({key: 'tb'}, this.renderDays())
 		];