親おや子こ月づきMeanings1nountwelfth lunar monthrare termRare historical term for the twelfth month of the lunar calendar, equivalent to 師走 (しわす). Used in classical or poetic contexts.See also: 師走古ふるい暦こよみでは、十じゅう二に月がつを親おや子こ月づきと呼よぶことがあった。In old calendars, the twelfth month was sometimes called 親子月.