What does red sand day mean?

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-June 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 (about), Qiu Ji (Xu Yue); Meng Dong (Haiyue), Winter Solstice (Ziyue) and Ji Dong (Ugly Yue).

Related introduction:

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.

As for red sand, it is famous for its "Dream of Golden Rooster" (ground branch corresponds to chicken-unitary genus) and "Four Middle Snakes" (ground branch corresponds to snake-unitary genus), and red sand is ugly in four seasons.

Therefore, the Mid-Autumn Festival in Meng Yue, namely silver moon, Mitsuki, Shen Yue and Haiyue, is a red sand day, and other Mid-Autumn Festival months and seasonal months are analogized as above.