Rumbur Valley, Chitral, NWFP, Pakistan Photograph (1 of 7) reproduced from Georg Morgenstierne's unique film documentary. In the background to the right two drummers can be seen, one with a wac (a small hourglass-drum) and the other with a dahu (a large drum). This is the Dancing Day (Granzulyak adu), the spring festival's (Joshi) third and last day.