A strange phenomenon! !

There are many coincidences in the leap July of the Year of the Dog.

Coincidentally, there are two springs in a year.

Even more coincidentally: beginning of spring meets Jiazi Day.

Evening News The coming Year of the Dog (Xu Bing Year) is very special. Yesterday, the reporter learned from Guanxiangshan Observatory in Qingdao that there are 385 days in the Year of the Dog this year, and people will spend the longest lunar year in this century. In this year of the dog, there will be a phenomenon of beginning of spring twice a year, and the most coincidental thing is that beginning of spring happens to meet Jiazi Day. Open the upcoming calendar of the Year of the Dog, and you will find that the Year of the Dog is "leap July". Why is it "leap July"? Sun Linan, an engineer at the Guanxiangshan Observatory in Qingdao, explained that the lunar calendar has 30 days for the big month and 29 days for the small month, and a year is 12 months * * 354 or 355 days, which is less than the tropical year of 365.2422 days 1 1 day, and about one month less every four years. Over time, there will be a strange phenomenon of time sequence and time disorder. In order to solve this problem, the method of adding "leap month" is adopted. The month after July of the Year of the Dog has only the solar term "White Dew". After beginning of autumn, ZhongQi spent another summer in a month, so there will be a month without ZhongQi. Therefore, the month that is neutral after July is named "leap July" after July, which is the reason for this year's "leap July". The year of the dog has eight big months and five small months, which is the year with the largest number of big months and leap months in this century, so it is the longest lunar year in this century. In the Year of the Dog next year, citizens can spend two beginning of spring. This phenomenon is called' two springs a year'. Sun Linan said that the leap month makes the Year of the Dog consist of 25 solar terms, including two beginning of spring days, namely, beginning of spring on the seventh day of the first month of the Year of Xu Bing and beginning of spring in beginning of spring on the seventeenth day of the twelfth month of the same year, which day, or how many beginning of spring there are in a year, is the result of the scientific arrangement of the calendar, which has nothing to do with the good or bad luck of human beings and the world. Sun Linan told reporters that the phenomenon of "two springs a year" will appear every few years. Sun Linan, the Jiazi in beginning of spring, also told reporters that February 4, 2006 was the seventh day of the first month of Xu Bingnian's first month, and its "dry branch day" happened to be Jiazi. Beginning of spring is the first of the four seasons, and "Jiazi" is the first of "Sixty Jiazi". It is very rare that two "heads" overlap. Sun Linan told reporters that although this situation is very rare, it is purely coincidental and has nothing to do with bad luck.

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Popular Science Question and Answer: Why does the Year of the Dog leap in July?

Q: Why does the Year of the Dog leap in July?

A: The year of the third lunar month (commonly known as the Year of the Dog) will have 13 months, which is 385 days. Repeated July is called leap July. Why leap July?

In order to keep the return year of the lunar calendar in sync with the Gregorian calendar, the ancients adopted the method of setting leap months.

There were 24 solar terms in the ancient calendar, which were divided into solar terms and neutral atmosphere. The lunar calendar is angry twice a month. The beginning of the month is called solar terms, and after the middle of the month is called qi. "For example, beginning of spring is the first month's solar term, and rain is the first month's gas."

The average length of the two solar terms in Gregorian calendar is 30.5 days, while that in Lunar calendar is only 29.5 days, with a difference of 1 day. So the monthly weather will be 1-2 days later than last month. If this goes on, there will always be a month when there is only solar terms and no gas. This non-neutral month is defined as "leap month" by the calendar and is called "leap month". This year's leap month is after July, which is leap July.

Why is there no leap in the first month? This is because the earth's orbit around the sun is an ellipse, and the sun is at a focus of the ellipse. In a year, the distance between the earth and the sun is near and far. When the earth is far away from the sun, it moves slowly around June in Gregorian calendar, so the interval between the two gases is longer, exceeding 3 1 day at the longest. According to the average length of the previous 30.5 days, there is a great possibility that there is no gas in the middle of the month and there is a great possibility of a leap month. So there are many opportunities in April, May and June.

Around 65438+February in Gregorian calendar, the earth moves fast and the neutral gas interval is short. The shortest is only a little more than 29 days, which is shorter than one month in the lunar calendar. Therefore, it is unlikely that neutral gas will not appear in January, November and December. On the other hand, there are fewer opportunities for leap months.

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The lunar year of the dog has 13 months.

Xinhua News Agency reports that the Spring Festival is approaching, and the upcoming Lunar New Year (commonly known as the Year of the Dog) will have two July months, adding a leap July to the normal July, and there will be 13 months ***385 days throughout the year.

A few days ago, experts from the Astronomical Society of Jiangsu Province said that the appearance of leap moon was the result of ingenious arrangement of the China lunar calendar to adapt to seasonal changes. In the lunar calendar, the calendar month is based on the change period of Wang Shuo's moon (the time when the moon presents the same phase twice in a row), with an average length of 29.5306 days. Therefore, the lunar calendar has 30 days for the big month and 29 days for the small month, and the whole year is 12 months, and there are only three 54 or 355 days in a year, which is different from the solar calendar year by 1 1 day. So there will be a difference of 1 month after two or three years. If it is not adjusted, as time goes by, the month will be reversed with the hot and cold days, and the calendar will lose its practical significance.

In order to keep the lunar calendar in sync with the Tropic of Cancer, the ancients adopted the method of setting leap months to solve this contradiction. The current lunar leap method is "19 year 7 leap", because the length of 19 tropic year is basically equal to 19 lunar year plus the total length of 7 leap months, so every two to three years, 1 month must be added, and the added month is called leap month. Therefore, the lunar leap year has 13 months.