The New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one. Many cultures celebrate the event in some manner. In the Gregorian calendar, the most widely used calendar system today, New Year occurs on January 1. This was also the first day of the year in the original Julian calendar and the Roman calendar.

The Japanese New Year is an annual festival that takes place in Japan. Since 1873, the official Japanese New Year has been celebrated according to the Gregorian calendar, on January 1 of each year, New Year's Day . Prior to 1872, traditional events of the Japanese New Year were celebrated on the first day of the year on the modern Tenpō calendar, the last official lunisolar calendar.