What is Red Sand Day?

Red Sand Day refers to the Mid-Autumn Festival in silver moon, Mitsuki, Shen Yue and Haiyue.

Every quarter of the year is divided into-Meng Yue, Mid-term and Yue Ji. According to the four seasons-spring, summer, autumn and winter. They are Meng Chun (silver moon), Zhong Chun (Uzuki) and Ji Chun (Chen Yue); Xia Meng (Mitsuki), midsummer (noon), the last month of summer (no month); Qiu Meng (Shen Yue), Zhong Qiu (Yueyue), Qiu Ji (Xu Yue); Meng Dong (Hai Yue), Midwinter (Zi Yue) and Ji Dong (Ugly Yue).

The month mentioned here is a calendar month (not a lunar month or a Gregorian month), which depends on the solar terms and does not depend on the first day. Every two solar terms are one month.

Silver moon:

Silver moon, also known as the first month, is the first month in the official calendar, with solar terms ranging from beginning of spring to fright.

In addition, in China's ancient calendar, there were sayings of "three rectifications" or "three constructions": Zhou Dynasty was 1 1 month (called "Jane Zi"), Yin Dynasty was 1 February (called "Jane Ugliness") and Xia Dynasty was1. "Building" refers to the place pointed by the top of the Big Dipper and the bucket handle.

Therefore, it is called "Li Xia". After the changes of "Jane Ugliness" (Yin Dynasty) and "Jane Zi" (Zhou Dynasty), the Xia system was restored in the Eastern Han Dynasty, which is still in use today. The calendar we use is actually a combination of yin and yang, and the summer calendar is often called "lunar calendar" in the almanac, which is actually inaccurate.

Refer to the above? Baidu encyclopedia-red pear

Refer to the above? Baidu Encyclopedia-silver moon