The Babylonians are commonly credited with starting the tradition of New Year’s resolutions. Around 2000 B.C., they celebrated Akitu, a 12-day New Year festival during which people made promises connected with religious and civic life.
Those promises included returning borrowed farming equipment and paying debts. Akitu began around the spring equinox, when the agricultural year started, rather than on January 1. The festival also involved crowning or reaffirming the king, making the occasion both spiritual and political.
The ancient Romans later adopted the Babylonian idea of making New Year promises. Under the Julian calendar introduced by Julius Caesar in 46 B.C., January 1 became the start of the year. Romans associated the date with Janus, the god of beginnings, transitions, doorways, and looking both backward and forward.
Modern resolutions—such as exercising, saving money, or breaking a habit—are more personal than the early promises, but they preserve the same basic idea: using the new year as a moment for renewal and self-improvement. The Babylonian origin is a conventional attribution, not evidence that modern resolutions began in exactly their present form.