IRNA|Meysam Mosalla: Every year, a couple of weeks before the arrival of spring, traditional singers known as Nowruz Khans herald the arrival of spring in the villages of northern Iran by singing and playing their instruments. With only half a month to the arrival of spring, a number of people, dubbed Nowruz Khans – singers performing traditional songs heralding the emergence of the new season and Nowruz – come to the villages of Mazandaran Province (in northern Iran) and announce the arrival of the new year, season and time for a thorough housecleaning.