<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" initialize="init();">
 
    <mx:Script>
        <![CDATA[
            protected static const MS_IN_DAY:uint = 1000 /*ms*/ * 60 /*seconds*/ * 60 /*minutes*/ * 24 /*hours*/;
 
            protected function init():void {
                sl.minimum = new Date(2010, 0 /*January*/, 1).time;
                sl.maximum = new Date(2010, 0 /*January*/, 31).time;
                sl.snapInterval = MS_IN_DAY;
 
                sl.value = new Date(2010, 0, new Date().date).time;
            }
 
            protected function dataTipFormatFunc(ms:Number):String {
                return new Date(ms).toDateString();
            }
        ]]>
    </mx:Script>
 
    <mx:HSlider id="sl" dataTipFormatFunction="dataTipFormatFunc" />
 
</mx:Application>

.myLabelStyle {
    color: white;
}