How are the seasons divided? Is January spring?

Astronomical division:1-March is spring, April-June is summer, July-September is autumn, and10-65438+February is winter.

Gregorian calendar: March-May is spring, June-August is summer, September-165438+10 is autumn, and 65438+2-February is winter.

There are two ways to divide the lunar calendar:

1, March is spring, April-June is summer, July-September is autumn,10-1February is winter.

2. beginning of spring-long summer is spring, long summer is summer, beginning of autumn-beginning of winter is autumn, beginning of winter-beginning of spring is winter.

There is also a phenological classification method considering the actual weather conditions in China: the season when the average temperature is lower than 10℃ for five consecutive days is winter, the season when the average temperature is higher than 22℃ for five consecutive days is summer, the season when the average temperature rises from 10℃ to about 22℃ is spring, and the average temperature drops from 22℃ to about 10℃.

So we can't be sure whether January is spring, because different division methods have different answers.