What's the comparison between the 24 solar terms?

The twenty-four solar terms are similar to the ancient Egyptian calendar. China's "Twenty-four solar terms" was officially listed in UNESCO's representative list of human intangible cultural heritage, which once again attracted people's attention to this ancient folk calendar. In Egypt, there is also a calendar that has a long history and has been passed down to this day. It has many striking similarities with China's "twenty-four solar terms".

Speaking of origin, this ancient Egyptian calendar is more advanced than our "twenty-four solar terms". According to the Middle East News Agency, Egypt's official news agency, it was born in the Pharaoh's period more than 6,200 years ago, more than 4,000 years earlier than the "24 solar terms" that began in the Qin and Han Dynasties.

But similar, all are solar calendars. China's "twenty-four solar terms" are divided according to the position of the sun on the ecliptic (that is, the orbit of the earth around the sun). Depending on the sun from the vernal equinox, every advance of 15 degrees is a solar term, and every week it returns to the vernal equinox at 360 degrees, which is a tropical year, so it is divided into 24 solar terms. This ancient Egyptian calendar is also based on observing the relationship between the earth and the sun. They set the day when Sirius and the sun appeared on the horizon at the same time as the beginning of the year.

At the beginning of each year, the Nile, Egypt's mother river, begins to flood. Therefore, the ancient Egyptians divided the year into three seasons-flood season, sowing season and harvest season. According to the fluctuation of Nile water and the growth law of crops, each season has four months. Thus, in this ancient Egyptian calendar, there are 12 months in a year, 30 days in each month, and 5 days are added as festivals at the end of the year.