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Why is the first day of June in the lunar calendar?
The first day of the sixth month of the lunar calendar is because from the time node, the lunar calendar enters a half-year period.

The first day of the sixth lunar month is a traditional festival of the Chinese nation, but it rains on the first day of June, which is conducive to a bumper harvest of grain. "If you sprinkle a little on the first day of June, farmers will eat a big bowl", "If it rains in the second half of the year, autumn grain will bear fruit" and so on. The first day of the sixth lunar month is coming. In the folk lunar calendar, it is called the first day of June, that is, half of the year has passed.

Every place has a certain custom on the Half-year's Day, that is, when the child is one year old or two years old, the plate is returned, which means that the child is old enough to leave his mother's milk and eat.

The historical origin of the lunar calendar:

From the ancient times to the opening of the solar calendar in the late Qing Dynasty, it was revised many times in history, and various calendars of 102 were produced in the history of China, which had a great influence on the culture and civilization of China.

For example, the official calendar (photo), the summer calendar, the Shang calendar (lunar calendar), the weekly calendar, the taichu calendar calendar in the Western Han Dynasty, the three-way calendar, the emperor calendar in the Sui Dynasty, the Dayan calendar in the Tang Dynasty and so on. Although some calendars are not officially used, they have played a role in medical care, medicine, ideology, astronomy, mathematics and so on.

The ancients observed the movement law of astronomical phenomena, and adopted the era of dry branches in ancient times. According to Wan Mingying, a historian of Ming Dynasty, it was invented when the branches were determined to be royalty according to the clear records in ancient Chinese literature, and it was recorded in detail in his book "Three Children's Singing Meetings". The invention of trunks and branches marked the emergence of the most primitive calendar, which was used to calculate the age by numbers.