The origin of 12 months in a year

The origin of a year 12 months is that the ancient Roman calendar originally had only 10 months, and the Roman emperor decided to add two months to the end of the year. Later, Julius Caesar moved these two months to the beginning of the year, becoming 65438+ October and February, and the original 65438+ October and February became March and April, and so on.

The Gregorian calendar has 12 months in a year. The Gregorian calendar originated from the ancient Roman calendar. The ancient Roman calendar was originally only 65,438+00 months, and the Roman emperor decided to add two months to the end of the year. Later, Julius Caesar moved these two months to the beginning of the year, becoming 65438+ October and February, and the original 65438+ October and February became March and April, and so on. This is the Gregorian calendar used in the world today.

The Gregorian calendar is also an international Gregorian calendar. The Gregorian calendar is customized according to the time that the earth revolves around the sun for one year, ***365 days, 5 hours, 48 minutes and 46 seconds. An average year is only an integer of 365 days, not a mantissa. A year is divided into 12 months, and large and small months are generally arranged alternately. Big moon 3 1 day, small moon 30 days, February only 28 days.

Another name for several months in China's lunar calendar.

1, January

The first month is the month of "building rights". In the era of observing images and observing times, bucket handle belonged to Yin, and the month was the first month. The establishment of the calendar was originally the concept of establishing the calendar in December. It has also been used to refer to the first month of other calendars. Now usually refers to the first month of the lunar calendar.

2. December

December is another name for the end of December. As far as "La" is concerned, there are records of "Roufu" and "Vera" as early as Zhouyi and Zhouli. The original meaning of "wax" is "dry meat" The end of December has many names, the most familiar of which is the nickname "twelfth month" This month's weather is most suitable for air-drying bacon, so it is called "twelfth lunar month".

Refer to the above content: Baidu Encyclopedia-Gregorian Calendar