Is the date of the Beginning of Autumn fixed? What changes will occur in the weather during the Beginning of Autumn?
The Beginning of Autumn is the thirteenth solar term among the twenty-four solar terms, which means the official beginning of autumn. So is the time of the Beginning of Autumn fixed every year? In the seventh month of the lunar calendar, many varieties of orchids will bloom, each with its own unique fragrance, filling July with the scent of orchids. Therefore, the seventh month of the lunar calendar is also known as the Orchid Month. You can learn more about the seventh month of the lunar calendar on Shuimo.com, so come and pay attention!Is the date of the Beginning of Autumn fixed?The beginning of autumn falls on August 7 or 8 of the Gregorian calendar every year, so it is not fixed on a certain day. When using the Gregorian calendar, the number of days in a general year is fixed at 365, which is different from the actual number of days in the solar year. However, the definition of the 24 solar terms is based on the exact number of days in a tropical year, which is basically dividing a tropical year into 24 equal parts. Therefore, when each solar term is mapped into the Gregorian calendar that the public is familiar with, its specific time is not fixed. The time of the Beginning of Autumn is closely related to the time of the Vernal Equinox. Generally speaking, if the Spring Equinox comes early, the Beginning of Autumn will also come early; if the Spring Equinox comes late, the Beginning of Autumn will also come late.What changes will occur in the weather during the Beginning of Autumn?After the Beginning of Autumn, the weather will continue to be hot, but the Beginning of Autumn indicates that the hot summer is about to pass and autumn is about to come. It also means that the grass and trees are beginning to bear fruit and the harvest season has arrived.The ancients regarded the Beginning of Autumn as an important moment between summer and autumn and always attached great importance to this solar term. After the beginning of autumn, as the tropical marine air masses retreat to the sea, the skies over many areas are gradually controlled by the transformed Siberian air masses, resulting in the most pleasant autumn weather of the year. However, since it is basically controlled by a single air mass, the wind direction varies greatly between morning and evening, with northwest winds often blowing at night and south winds blowing during the day. Therefore, after the beginning of autumn, the weather will gradually become cooler, and the temperature difference between morning and evening will be large. Sometimes you will feel very cold when wearing long sleeves in the morning, but at noon, you will still feel hot when wearing short sleeves. This is why there is a saying among the people that the autumn tiger is the "autumn tiger". The autumn tiger usually occurs at the turn of August and September and lasts for about 7-15 days. |
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