August 7th in 2021
Risshū (立秋) is the 13th of 24 solar terms (24節気) in the traditional East Asian calendars.
Risshū (立秋) literally means stand fall, and it is the first day of autumn by the old calendar.
It is supposed to be the season that you can feel a sign of autumn starting, but, of course, it’s still very hot. Actually, it is the hottest season of the year.