Refers to the middle of summer, often used in literary or poetic contexts. In modern Japanese, 真夏 (まなつ) is more common for everyday use.
fifth month of the lunar calendar
Obsolete term for the fifth month of the old lunar calendar, roughly corresponding to June. Cross-referenced with 皐月 (さつき), which is the more common name for that month.
See also: 皐月
In this midsummer season, I hope you are all doing well.
In the old lunar calendar, 仲夏 corresponds to the month of Satsuki.