Does the autumnal equinox mean the same thing as beginning of autumn? The difference between the autumnal equinox and beginning of autumn.

The biggest difference between beginning of autumn and the autumnal equinox is the different time. Beginning of autumn time is from August 6th to 9th every year, when the sun reaches 135 degrees. The autumnal equinox is from September 22nd to 24th every year, and the sun reaches longitude 180 degrees.

2. Different solar terms and climate

Beginning of autumn has arrived, but not in autumn. So beginning of autumn doesn't mean the hot weather is over. It is still very hot in early autumn. From the autumnal equinox, the days get shorter and the nights get longer. The temperature difference between day and night will gradually increase, and the amplitude will be higher than 10℃. The temperature drops day by day, getting colder every day, and gradually entering the late autumn season.