年とし端は月づきMeanings1nounfirst lunar monthrare termRare historical term for the first month of the lunar calendar, equivalent to 睦月 (むつき). Used in classical or poetic contexts.See also: 睦月古ふるい暦こよみでは、年とし端は月づきは睦月むつきと同おなじく一いち月がつを指さす。In old calendars, 年端月 refers to the first month, just like 睦月.