July filariasis refers to

Filariasis in July is a weather phenomenon.

The weather turns cold in July of the lunar calendar, and the sun sets late in summer, so there will naturally be a lot of blushing in the west. Relatively speaking, the weather is not very common, and it will be thought that there are many falls on Mars, which makes the rumor of filariasis continue to spread in July. This is actually a solar term and the characteristics of climate change in the corresponding time period. The current "July fire" has often been wrongly used to describe the summer heat for many years.

Ancient calendars in China have always been related to astronomical phenomena. The "fire" here refers to the "fire" star, which is the main star of Scorpio-Antares. During the summer calendar of the Book of Songs (around the midsummer solstice), Antares appeared in the south of the sky at dusk, with the most positive direction and the highest position. Gradually go west after June.

At dusk in July, its position gradually descended from Zhongtian to the west, "Go to Qiu Lai in summer." People call this phenomenon "July filariasis", that is, "Antares" slowly sets westward at night, indicating that the cold season is coming and the weather is getting colder.

Related information:

"Fire in July" was originally a poem in The Book of Songs: Fire in July, clothes delivered in September. Its main idea is that whenever a star named "fire" appears in the western sky at dusk in July of the lunar calendar, the summer heat will begin to fade, and it will be cold in September, so you should wear more clothes. It is important to point out here that this star named "Fire" is not Mars.

"Six" means moving down. By the evening of July in the lunar calendar, it has moved to the western sky, so it is called "July Fire". It can be seen that "July filariasis" does not mean the hottest dog days at all, but refers to the season when the weather gradually turns cold. Therefore, it is wrong to use "July fire" to describe high temperature weather.