Bug 202121 setDateFormat does not working
If you want to set date format of the table column style you have to use setDateTimeFormatCategory and setDateTimeFormat instead of setDateFormatCategory and setDateFormat. If you will try to use setDateFormatCategory in the first case in xml-source you will see that your style contains dateFormat property. This property is not working at all, in the second case in xml-source you will see that your style contains dateTimeFormat property. I think it will be better if the result of setDateTimeFormatCategory and setDateFormatCategory will be the same.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/css/dom/AbstractStyle.java
public String getVolume( )
	{
		throw createUnsupportedPropertyException( "volumn" );
	}
	public void setVolume( String volume ) throws DOMException
	{
		throw createUnsupportedPropertyException( "volumn" );
	}
	public String getWidth( )
	{
		throw createUnsupportedPropertyException( "width" );
	}
	public void setWidth( String width ) throws DOMException
	{
		throw createUnsupportedPropertyException( "width" );
	}
	public String getZIndex( )
	{
		throw createUnsupportedPropertyException( "zindex" );
	}
	public void setZIndex( String zIndex ) throws DOMException
	{
		throw createUnsupportedPropertyException( "zindex" );
	}
	private DOMException createUnsupportedPropertyException( String property )
	{
		return new DOMException( DOMException.NOT_SUPPORTED_ERR, property );
	}
}