i try this
array('age,'compare','operator'=>'<=', '1993-12-03'),
or this
array('age','compare','compareAttribute'=>"1993-12-03",'operator'=>'<'),
to validate that the input date were before 1993-12-03 in the models rules, but it did not works.
I call for help, any idea will be very appreciate. 
where?
in the public function rules() of the model file in \protected\models\ folder among the requiered, numerical, length, unique and safe validations.
Did you figure it out?
not really, this is the closest that i’ll got
array('fnacimiento', 'match', 'pattern' => '%^19[1-9][0-9]-\d{2}-\d{2}$%', 'message' => 'Ingrese una fecha correcta'),
@quantico, Have you tried
array('age','compare','compareValue'=>'1993-12-03','operator'=>'<'),
That’s the syntax as per @jellysandwich link