noun
Abbreviation of 太陰太陽暦. Refers to a calendar based on both moon phases and the solar year, such as the traditional Japanese calendar before the Meiji period.
See also: 太陰太陽暦
旧暦は陰陽暦の一種です。
The old Japanese calendar is a type of lunisolar calendar.
Refers specifically to the old Japanese lunisolar calendar; 陰陽暦 is the general term for any lunisolar calendar.
Solar calendar (e.g., Gregorian); contrasts with 陰陽暦 which also incorporates lunar months.
Compound of 陰 (in, 'moon' or 'yin'), 陽 (yō, 'sun' or 'yang'), and 暦 (reki, 'calendar'). The term directly describes a calendar that integrates lunar and solar cycles.