Tammuz & Av – Gad & Dan The months Tammuz and Av, illustrated with the tribes Gad and Dan, from Jüdischer Jugendkalender 5690. The months Tammuz and Av, illustated with the tribes Gad and Dan, from the 1929/30 edition of Jugendkalendar, published by Jüdischer Verlag, edited by Emil Bernhard Cohn.