Xuanming calendar; Tang lunar calendar
Historical term for the Chinese lunisolar calendar adopted in Japan from 862 to 1685. Used primarily in historical or astronomical contexts.
The Xuanming calendar is a lunisolar calendar that was used in Japan for 823 years.
General term for a lunisolar calendar; 宣明暦 is one specific historical example.
From Chinese 宣明曆 (Xuānmíng lì), the name of a Tang dynasty calendar. The exact derivation of the name is uncertain; it was adopted into Japanese as 宣明暦 (せんみょうれき).