When is beginning of autumn in 2020?

Beginning of autumn time in 2020 is: Friday, August 7th, 2020 at 9:06:03.

Beginning of autumn is the 13 solar term among the 24 solar terms, with the Beidou bucket handle pointing southwest and the sun reaching the longitude of 135. The festival is celebrated every year from August 7th to 9th in the Gregorian calendar. Beginning of autumn is the first solar term and the starting point of autumn. Autumn begins in the beginning of autumn and ends in beginning of winter, which is the result of celestial movement.

From the perspective of solar terms:

After beginning of autumn, it really entered autumn, and the arrival of beginning of autumn also marked the beginning of autumn.

But because beginning of autumn is still in dog days, it is not autumn.

From the point of view of temperature:

After entering beginning of autumn, in order to distinguish between the heat in autumn and the heat in summer, meteorologists have now added an autumn condition: "After beginning of autumn, the average temperature will remain below 22 degrees for five consecutive days", which is considered as the official entry into autumn and ends when it is below 10 degrees.

Therefore, it is not really autumn after beginning of autumn.