noun
solar calendar; Gregorian calendar
Refers to the modern solar calendar, especially the Gregorian calendar, as opposed to the traditional lunisolar calendar (旧暦).
日本では明治時代に新暦が採用された。
The solar calendar was adopted in Japan during the Meiji period.
新暦の1月1日は元日です。
January 1st on the Gregorian calendar is New Year's Day.