What are the dates of beginning of spring, Changsha, beginning of autumn and beginning of winter?

Beginning of spring is from February 3rd to 5th, long summer is from May 5th to 7th, beginning of autumn is from August 7th to 9th, and beginning of winter is from June 5438+065438+1October 7th to 8th.

When the sun reaches longitude 3 15, it is the beginning of the vernal equinox. Beginning of spring means the beginning of a new cycle, which is the beginning of everything and the meaning of all self-renewal. Standing means "start"; Spring represents warmth and growth.

The solar term in long summer is when the sun reaches 45. Astronomically, Chang Xia said that bidding farewell to spring is the beginning of summer. When the temperature rises obviously, the summer heat comes, thunderstorms increase and crops enter the peak season, people are used to taking long summer as an important solar term.

When the sun reaches the longitude 135, it will be beginning of autumn. "Autumn" means cool in summer. In early autumn, Beidou points southwest. From this day on, autumn began, the autumn was crisp, the moon was bright and the wind was clear. Since then, the temperature has gradually decreased from the hottest time.

When the sun reaches longitude 225, winter begins. Li also means that winter has started from now on; Everything is harvested in winter, animals take shelter from the rain, and those who harvest in autumn also reap the harvest.