Akitu is the ancient Mesopotamian festival widely cited as an early predecessor of New Year's celebrations.
Akitu was a major religious festival in ancient Mesopotamia, especially associated with Babylon and the worship of the god Marduk. It was held in spring, around the beginning of the agricultural year, rather than on January 1. The festival included processions, rituals, royal participation, and ceremonies intended to renew divine and social order.
The Babylonian New Year was linked to the first visible new moon after the spring equinox. Celebrations could last many days and included movement between temples and a ceremonial route outside the city. Texts and archaeological evidence show that Akitu was not a single modern-style party but a complex state and religious observance.
Calling Akitu a predecessor does not mean that today's January 1 customs descend directly from one unchanged ceremony. Calendars differed greatly across ancient societies. The connection is that Akitu combined a new-year marker with renewal, ritual, procession, and hopes for prosperity—motifs that remain familiar in later celebrations.