Why is it twelve months all over the world?

When Julius Caesar served as consul for the third time, he appointed a group of astronomers headed by Egyptian astronomer Sotchini to make a new calendar, that is, julian calendar. The main content of julian calendar is to set up a leap year every three years, with 365 days in a normal year and 366 days in a leap year, with an average length of 365.25 days. Take the original 1 1 month 1 as the beginning of the year, so that the Roman consul will take office on New Year's Day.

Julian calendar is divided into 12 months every year, 1, 3, 5, 7, 9,1/month is a big month, and 3 1 day is a month. The 4th, 6th, 8th, 10 and 12 months are the abortion periods, with 30 days of abortion every month. The second month (original1February) has 29 days in a normal year and 30 days in a leap year. Although the order of months is different from that before the calendar change, it still retains its original characteristics and is the shortest month in a year.

Julian calendar was implemented in Rome in 709 AD, that is, 65438+ 1 in 45 BC.

Extended data

January

The first month of the lunar calendar is also called the first month. Wu said in Dream of the First Month: "The first day of the first month is called New Year's Day, commonly known as the first day of the New Year's Day." Su Weidao, a poet in the Tang Dynasty, described in the poem "The fifteenth night of the first month": "The fire trees and silver flowers are combined, and the stars and bridges are locked."

The first month, also known as Duanyue, was changed to Duanyue in order to avoid the taboo of the first emperor's name. Qin Shihuang was famous for his rectification. "Biography of Feng Yanchuan in the Later Han Dynasty" said: "Spring comes at the beginning of the year, and all flowers contain English." The "opening year" here also refers to January of the lunar calendar.

February

"Spring Garden can't be closed, and an apricot is out of the wall." The red apricot in Ye Shaoweng's poems in Song Dynasty was named Apricot Moon because it bloomed in February. Because February is in the middle of spring, it is also called mid-spring. Erya Shi Tian said, "February is like this." According to Yi: If you follow righteousness, everything will follow, if it is natural. February in the lunar calendar is also called the moon.

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