正月
Prior to the Meiji period, the date of the Japanese New Year had been based on Japanese versions of lunisolar calendar (the last of which was the Tenpō calendar) and, prior to Jōkyō calendar, the Chinese version. However, in 1873, five years after the Meiji Restoration, Japan adopted the Gregorian calendar and the first day of January became the official and cultural New Year's Day in Japan.