Zagmuk, which literally means "beginning of the year", is a Mesopotamian festival celebrating the New Year. The feast fell in March or April and lasted about 12 days. It celebrates the triumph of Marduk, the patron deity of Babylon, over the forces of Chaos, symbolized in later times by Tiamat. The battle between Marduk and Chaos lasts 12 days, as does the festival of Zagmuk. In Uruk the festival was associated with the god An, the Sumerian god of the night sky. Both are essentially equivalent in all respects to the Akkadian "Akitu" festival. In some variations, Marduk is slain by Tiamat and resurrected on the vernal equinox.