Questions about the calendar, what is the calendar?

The calendar is a method of calculating time according to celestial phenomena to meet the needs of people's daily life. The calendar based on the Moon's orbit around the Earth is called the lunar calendar; The calendar, which is based on the position of the sun in different seasons, is called the solar calendar. There are two kinds of names for the calendar that are common in our country:

Gregorian calendar, lunar calendar (leap years have only 13 months, because the moon has to circle the earth 13 times a year to complete the year).

from the classification criteria.

The lunar calendar corresponds to the solar calendar, plus the lunisolar calendar.

There are only these three calendars. No calendar in the world can break out of the classification of these three calendars. The "Gregorian calendar" (new calendar) that is commonly used in the world is actually a solar calendar, while the traditional Chinese calendar.

The "lunar calendar" (old calendar) belongs to the lunisolar calendar.

The legend of the calendar

According to legend, a long time ago, there was a young man named Wan Nian. Once, when he went up the mountain to collect firewood, he sat down in the shade of a tree to rest because it was hot. Suddenly, the movement of the shadows of the trees on the ground inspired him. After returning home, he spent a few days developing a sundial that measured the time of the day.

However, when the weather is cloudy, rainy or foggy, the measurement accuracy is affected by the absence of sun. Later, the dripping spring on the cliff piqued his interest, so he made a five-layer leaky pot by hand.

As the days went by, he found that every 360 days, the length of the day had to be repeated.

The king at that time was called Zu Yi. The unpredictable weather also made him very depressed. After Wan Nian knew about it, he couldn't help but take the sundial with him.

and the leaky pot went to see the monarch Zu Yi and explained to Zu Yi the truth of the operation of the sun and the moon.

After hearing this, Zu Yi was very happy and thought it was very reasonable. So he left 10,000 years at the same time in the Temple of Heaven.

Before building the Sun Moon Pavilion, building the sundial platform and the leaky pot pavilion. and sent twelve young men to serve for ten thousand years. Zu Yi said to Wan Nian: "I hope you can accurately measure the law of the sun and the moon, calculate the accurate morning and evening time, and develop a calendar for the benefit of the people of the world." "

Winter goes to spring, year after year. After 10,000 years of long-term observation and careful calculation, an accurate solar calendar was finally produced.

When he presented the solar calendar to his successor, he was already covered with a silver beard. The monarch was greatly moved, and for the merits of ten thousand years, he named the solar calendar as the perpetual calendar, and named ten thousand years as the sun and moon birthday star Zhipei.

The so-called calendar, simply put, is the law of measuring long time intervals according to the natural law of celestial changes, judging climate changes, and predicting the coming of seasons. The calendar is a long-term system of time, an arrangement of years, months, days, and hours. China's agricultural production has a long history, because agricultural activities are closely related to the changes of the four seasons, so the calendar was originally created by the needs of agricultural production.

In addition, the new calendar is related to the new regime, and according to the tradition of our country's past dynasties, the change of dynasty must be changed to a new calendar.

Due to the rotation of the earth, the phenomenon of day and night alternated between day and night, and the concept of "day" was born. The time it takes for the earth to rotate around is called a day, also called a day. If you use days to calculate longer time intervals, then large numbers will appear, so it is necessary to establish units for measuring longer time intervals.

Since ancient times, people have chosen a time measurement system based on the return year, and determined the relationship between the unit of the return year and the day, and how to choose the starting point. We call this method the calendar. The year of return is also called the year of the sun.

The cycle in which the earth revolves around the sun to produce a cycle of four seasons is the return year. A return year is the day. However, in the calendar, a year must contain an integer of days, known as a calendar year.

With the development of human society, great efforts have been made to make the average length of the calendar year as close as possible to the length of the return year. As a result, the calendar has undergone many changes. There are three main types of calendars: the solar calendar, the lunar calendar, and the lunisolar calendar.

The solar calendar, or Gregorian calendar, is now commonly used. The normal year of the solar calendar is defined as 365 days. The year is divided into 12 months:

It is a big month, with 31 days per month and a small month, 28 days in February, and 30 days per month for the rest of the month. In this way, the time of each year of the solar calendar is shorter than that of a return year, and the time of every four years is shorter, i.e., every year divisible by 4 is a leap year, and February of a leap year is given an additional day to 29 days. However, there are 365 4 1 = 1461 days in the four years of the solar calendar, and there are about 3 days more days in the four years of the return year, that is, the four years of the solar calendar are about three days longer than the four years of the return year, so the four hundred years of the solar calendar will be about 3 days longer than the four hundred years of the return year.

In other words, in addition to placing a leap year every four years, the Gregorian calendar also has to subtract 3 days every 400 years to make its average year length closer to the length of the return year. For this reason, it is stipulated internationally that in every 400 years, only the years in which the century years (such as 1900, 2100, and 2200 are called century years) are divisible by 4, that is, every hundred years are divisible by 400 are considered leap years, for example, 2100, 2200, and 2300 are all century years, but they are not leap years; The years 2000, 2400, and 2800 are both century and leap years. The average annual length of the Gregorian calendar is (365 400 100 3) 400 = days.

In this way, it is only a day away from the year of return, and it will take more than 3,000 years for the difference between the two to be one day. Obviously, its accuracy is already very high. As a result, the Gregorian calendar (i.e., the current Gregorian calendar) has been widely adopted by countries around the world.

The Gregorian calendar was adopted in 1912.

The explanation of the words of the calendar is: the method of calculating time by year, month, and day. It is mainly divided into three categories: the solar calendar, the lunar calendar, and the lunisolar calendar. The specific calendar also includes the method of the year.

The explanation of the words of the calendar is: the method of calculating time by year, month, and day. It is mainly divided into three categories: the solar calendar, the lunar calendar, and the lunisolar calendar.

The specific calendar also includes the method of the year. The phonetic pronunciation is: 1. The part of speech is:

Noun. Pinyin is: lìfǎ.

The structure is: calendar (semi-enclosed structure) method (left and right structure).

What is the specific explanation of the calendar, we will introduce it to you through the following aspects:

Verses about the vertical rolling of the calendar.

Push the calendar, the law, the calendar, the Xijing, the secret, the calendar, the law, the law.

Words about the calendar.

calendar

Idioms about the calendar.

Knowing the law, breaking the law, enforcing the law, and committing the law can be burned.

Words about the calendar.

It has lasted for a long time, and it has been hard to rule, and it has been a long time, and it has been a long time.

Sentence formation about calendar.

1. It can be seen that the 24 solar terms have no connection with the lunar month, and are completely "self-contained", which belongs to the solar part of the lunisolar calendar of the traditional Chinese calendar.

2. Scholars have deciphered the Zabatec calendar as a precursor to the Mayan calendar.

3. The safe period method, also known as the calendar method, or the calendar safe period method, is a natural contraceptive method.

4. The festival activities of the winter solstice were once very rich, known as the "fat winter and thin year", and the winter solstice festival reached its peak in the Song Dynasty, however, with the passage of time and the change of the calendar, the winter solstice festival was gradually forgotten.

5. No matter what kind of calendar it is, there are two most important components, one is to record the year, and the other is to place the intercalation.