Janus, the ancient Roman god of beginnings and transitions, gave January its name and became linked with looking backward and forward.
Roman tradition portrayed Janus with two faces, allowing him to look in opposite directions. That image made him a natural symbol for thresholds, doorways, endings, beginnings, and the transition from one period to another. January, the first month of the Roman and modern Gregorian calendar, derives its name from him.
New Year observances are not simply direct survivals of one ancient Roman ceremony. Roman calendars and customs changed over time, and modern New Year’s Eve celebrations combine religious, civic, regional, and popular traditions from many eras.
The two-faced image is often interpreted as regret and hope, but the more precise historical association is transition and the ability to face both what has passed and what is beginning. Janus is therefore a symbolic ancestor of New Year reflection, not a personification of the holiday itself.