What is "Red Sand Day"
Interpretation of "Turn to God" and "Chu Yong Quyi Shuo": the fourth day of Meng Yue, the unitary day in the middle of the month, and the ugly day of the season. Ugliness is evil because of the four strokes of innate numbers. The number of warps is nine, the base number is six, and the total number is thirty. From the child until the age of 30, it is the fourth month.
There are seven in Shenyin and four in Hayes, making a total of 22. From the son to the twenty-second see unitary, for four Meng Yue is evil. There are five in Chen Xu, but not eight in ugliness, a total of 26. Since I went straight to 26, I saw ugliness for the four seasons. This is also the reason for Ren Shen's appearance.
Each quarter of a year is divided into:
Meng Yue, Zhong Yue, 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 (about), Qiu Ji (Xu Yue); Meng Dong (Haiyue), Winter Solstice (Ziyue) and Ji Dong (Ugly Yue).
The month mentioned here is a Gregorian calendar month (not a lunar calendar month, nor a Gregorian calendar month), which is subject to solar terms and does not depend on the first day. Every two solar terms are one month. One month is represented by 12 respectively.
Baidu Encyclopedia-Red Sand Day