Silkworm Time in Grain Rain谷雨桑蚕季

There is a Chinese saying:"Grain Rain Season, Silkworm Time." It means Grain Rain is a season for Silkworm. During the grain rain season, the farmer can continue to raise silkworms because the mulberry trees will flourish during this period, providing many leaves for the silkworms to eat. This is a crucial time for silkworm-feeding. In order to avoid the delayed growth of mulberry trees due to low temperatures and overcast skies, which would fail to guarantee the demanded mulberry leaves for the baby silkworms, the farmers usually feed the baby silkworms in batches so as to help the silkworm farmers out of the trouble.

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The Calculation of Grain Rain 谷雨的算法

The traditional East Asian calendars divide a year into 24 solar terms (节气). Grain rain (谷雨Gǔyù) is the 6th solar term. It begins when the Sun reaches the celestial longitude of 30° and ends when it reaches the longitude of 45°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 30°. In the Gregorian calendar, it usually begins around April 20 and ends around May 5.

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Last Solar Term in Spring: Grain Rain(谷雨Gǔyù)

The traditional East Asian calendars divide a year into 24 solar terms (节气). Grain rain (谷雨Gǔyù) is the 6th solar term. It begins when the Sun reaches the celestial longitude of 30° and ends when it reaches the longitude of 45°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 30°. In the Gregorian calendar, it usually begins around April 20 and ends around May 5.

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24 Solar Terms: Grain Rain(Gu yu) 24节气之谷雨

Grain Rain(谷雨ɡú yǔ) Introduction
“Grain Rain” is the sixth solar term in the 24 solar terms. It is the last solar term inspring when the sun reaches the celestial longitude of 30 degrees around April 20 toApril 21 every year. The term “Grain Rain” is originated from a folk story. When CangJie, an official from the Yellow Emperor period, created writing characters, grain camedown from sky like rainfall. Therefore, the Yellow Emperor named this day as the “GrainRain”. When this day comes, the amount of rainfall increases much than the day of“The Rain”, which is very important for the growth of the crops. After this day, theduckweed starts to grow after rainfall, the cuckoo starts to sing and hoopoe starts toappear on mulberry tree. The temperature in most of the basin areas increases quickly.Apart from the north-west part, most of the basin areas in China reach 20 to 22 degreeCelsius.

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