What's the date of August 23rd in the lunar calendar?

As of September 2023 1 1, this date is the eighth day of the seventh lunar month.

Wednesday, August 23rd, Gregorian calendar, the eighth day of July, 2023. The solar term of this day is the summer heat, which is the fourteenth solar term among the twenty-four solar terms. The word "summer heat" first appeared in Mandarin. The Western Han Dynasty's "Huainanzi Astronomical Training" clearly listed "summer heat" in the 24 solar terms.