Set the disabledDays property in two different ways: using tags and using tag attributes
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:DateField> <mx:disabledDays> <mx:Number>0</mx:Number> <mx:Number>6</mx:Number> </mx:disabledDays> </mx:DateField> <mx:DateField disabledDays="[0,6]" /> </mx:Application>