What date is the autumnal equinox? 2023.

The autumnal equinox in 2023 is September 23rd.

On the day of the autumnal equinox, the sun shines almost directly on the equator of the earth, and the length of day and night is equal all over the world. The autumnal equinox means "equally divided" and "equally divided", which means equally dividing autumn except day and night. After the autumnal equinox, the position of direct sunlight moves south, and the days in the northern hemisphere become shorter, the nights become longer, the temperature difference between day and night increases, and the temperature drops day by day. The autumnal equinox in 2023 is September 23rd.

Now Mid-Autumn Festival comes from the traditional autumnal equinox "offering sacrifices to the moon". According to textual research, the Mid-Autumn Festival was originally set on the day of the autumnal equinox, but because this day is not always a full moon, the Mid-Autumn Festival was later transferred from the twenty-four solar terms of the autumnal equinox to the fifteenth day of the eighth lunar month.

Climatic characteristics of autumnal equinox

Half. Since the autumnal equinox, the climate has three main characteristics: the direct sunlight continues to move from the equator to the southern hemisphere, and the phenomenon of short days and long nights in the northern hemisphere will become more and more obvious, with shorter days and longer nights (until the winter solstice reaches long nights and short days); The temperature difference between day and night gradually increases. The situation in the southern hemisphere is just the opposite. After the autumnal equinox, the direct sunlight moves south, the days in the northern hemisphere become shorter, the nights become longer, and the temperature drops, which is of universal significance throughout the country.

At the autumnal equinox, China's Yangtze River basin and its vast areas to the north successively entered the autumn divided by "climatic average temperature", and the daily average temperature dropped below 22℃. The cold air mass in the north began to have some influence. The rainy season has just ended in most areas, with a cool breeze blowing gently. Autumn is crisp and the sky is high and the clouds are light.