New year is a holiday, coming at the moment of transition from the last day of the year to the first day of the next year. A custom to celebrate New year existed already in Ancient Mesopotamia in the third millennium B.C. A start of a year at January 1 was established by a Roman governor Julius Caesar in the 46th year B.C. In Ancient Rome this day was devoted to Janus — god of a choice. The month received its name of January in honor of god Janus who was pictured with two faces: one looking forward, and another — back.