In 46 BC, in Rome, New Year’s was invented. The early Roman calendar consisted of 10 months and 304 days, with each new year beginning at the vernal equinox. It was created by Romulus. Later, King Numa Pompilius Ended up adding January and February to the year. By creating a calendar, this helped them keep track of harvesting hunting, etc.. How did they create it you may ask. They use the sunlight and darkness and used the seasons. They invented New Year’s Eve to celebrate the new year.