Why does the yellow calendar have a yellow word?

Almanac is a code of conduct followed by ancient emperors and a calendar promulgated by emperors, so people call it "imperial calendar"; After the Revolution of 1911, the imperial system was overthrown and the "imperial calendar" was rewritten as the "yellow calendar". The yellow calendar not only includes astronomy, meteorology, seasons and seasons, but also contains some taboos that people should abide by in their daily lives. Its content guides the farming opportunity of working farmers in China, so it is also called the farmers' calendar. People in the Gregorian calendar are also commonly known as "general books". However, in Cantonese, because the word "Shu" in Tong Shu is homophone with the word "lose", it is also called "Tong Sheng" because of taboo.

Source: network link