Why overlaps is not working

["Andrus" <eetasoft@xxxxxxxxx>]

set datestyle to iso,iso;

select 1 where ('2006-10-31'::date, '9999-12-31'::date) OVERLAPS
   ('2006-10-16'::DATE, '2006-10-31':: DATE)


does not return any rows.

Why ?
How to make overlaps to return correct result?

Andrus.