noun
beginning of autumn
Obsolete term for the start of autumn, used in classical or poetic contexts.
孟秋の候、いかがお過ごしでしょうか。
In this early autumn season, how are you getting along?
noun
seventh month of the lunar calendar
Refers to the seventh month in the traditional Japanese lunar calendar, roughly corresponding to August.
旧暦では孟秋は七月にあたる。
In the old lunar calendar, Mōshū corresponds to the seventh month.