What fortune-telling in leap year _ What fortune-telling is the most accurate in leap year?

What is the average year? What is a leap year? How to calculate?

A year without leap days in the solar calendar or leap months in the lunar calendar is called a flat year. The average solar year is 365 days, the average lunar year is 354 days or 355 days, and a few days are 353 days.

Confirmation method:

1, look at the last two digits of the year. If the last two digits are not divisible by 4, then it is a normal year; On the contrary, it is not.

2. When the last two digits are 0, look at the first two digits of the year. If the first two digits are not divisible by 4, it is a normal year; On the contrary, it is not.

A year with a leap day in the solar calendar or a leap month in the lunar calendar is called a leap year. The average solar year is 366 days, and the average lunar year is 355 days or 356 days.

Confirmation method:

1, the Gregorian calendar year is a multiple of 4, not a multiple of 100, but a leap year; On the contrary, it is not.

2. The Gregorian calendar year is a whole hundred, and it must be a multiple of 400 to be a leap year; On the contrary, it is not.

Extended data:

In modern times, a tropical year is about 365.242 days, while the average lunar month is about 29.5 days. When people simply take 12 lunar months as a lunar year, its length is about 354 days, which is less than the tropic of cancer. However, if 13 lunar months are regarded as a lunar year, its length is about 384 days, which is longer than the tropic year.

Therefore, according to certain arrangement rules, the calendar-making organization appropriately selects 12 or 13 lunar month as lunar year to balance the difference between lunar year and tropic year. That is, one year old is equivalent to the tropical year, and a tropical year is a complete seasonal cycle on the earth; The length of a single lunar year is not equal to the length of the tropic year, and the lunar year is arranged with reference to the tropic year, so that the overall average year is close to the tropic year.