August 8, 2: 22, 4 1 sec. According to the calendar website, beginning of autumn in 2023 is at 2: 22: 4 1 sec on August 8th, and Tuesday on June 22nd of the lunar calendar, and eight days have passed since today (August16th, 2023). Beginning of autumn is the 13 solar term among the 24 solar terms, and the first solar term in autumn is on August 7th or 8th of the Gregorian calendar every year.