Calendars are laws of measurement longer than what is measured

The calendar is a law of measurement longer than the day.

Calendar, simply put, is the law of measuring longer intervals of time, judging changes in climate, and predicting the coming of seasons according to the natural law of celestial changes. The history of ancient Chinese astronomy is, in a sense, a history of calendar reform. The river of time is infinite, and only by determining the exact position of each day in it can we record history and organize our lives. The calendar based on the moon's orbit around the earth is called the lunar calendar; the calendar based on the sun's positional changes in different seasons is called the solar calendar. Two names for the calendar prevail in China: Gregorian calendar and lunar calendar (leap year has 13 months because the moon has to circle the earth 13 times in a year to make a full year).

Introduction to Calculation:

The calendar is a law that measures intervals of time longer than days. The calendar is a method of calculating time based on celestial events to meet the needs of people's daily lives. According to the moon orbiting the earth by the calendar is called the lunar calendar; according to the sun in different seasons of the position of the calendar is called the solar calendar. In China, there are two common names for the calendar: the Gregorian calendar and the lunar calendar. The Chinese lunar calendar, the Hindu calendar, and the Jewish calendar are yin and yang calendars with 12 or 13 months in a year; the Islamic calendar is a taiyin calendar with only 12 months in a year. Later, China began to adopt the Western calendar, commonly known as the "New Calendar", as opposed to the old Chinese calendar.

Introduction to the calendar:

The rotation of the earth forms the day, and the rotation of the earth forms the year. The law of projecting the length of the year, month, and day and the relationship between them, and formulating the sequence of time is called the calendar. Ancient Egyptian astronomers calculated the number of days in a year based on the time interval between the first appearance of Sirius each year. Using this method, they found that there were 365 days in a year. The ancient Egyptians divided 1 year into 365 days, thus inventing the world's earliest calendar. At the same time, the ancient Egyptians further divided 1 year according to the lunar cycle. The interval between two full moons was 29.5 days, so there were 12 "full moons" in a year, adding up to only 354 days. The ancient Egyptians thus created such a calendar: a year of 12 months, each month only 30 days, and the extra 5 days do not belong to any month. The Romans took the Egyptian calendar and improved it considerably, resulting in the calendar we know: 11 months of the year have 30 or 31 days, and one month (February) has only 28 or 29 days. We call this the Gregorian calendar. For thousands of years, people have kept track of the time of year by observing the heavens. People from different cultures around the world have been trying to create practical ways to calculate the yearly cycle. Ancient China had one of the most advanced calendars of its time, the Chinese Lunar Calendar, which is a combination of the changing phases of the moon and the earth's rotation around the sun, and is used today.

Introduction of the Lunar Calendar:

The Lunar Calendar is China's traditional calendar, also known as the Lunar Calendar, Chinese Calendar, Summer Calendar, Han Calendar, and National Calendar, which is a yin and yang calendar, which takes the cycle of the moon's phases, i.e., the solstice month, as the length of the month, and refers to the solar return year as the length of the year, and sets up the intercalary month in order to make the average calendar year compatible with the return year. According to the Chinese ancestor Xuanyuan Huangdi ascended to the throne as the first year, this year is the lunar calendar 4713 C Shen monkey year (2016.02.08 ~ 2017.01.27), China's traditional calendar than the Western calendar 2697 years earlier, with the year of the Western year + 2697 that is, the year of China's traditional calendar. Ancient texts and oracle bone inscriptions have many records of the lunar calendar, and a large number of historical texts record that the lunar calendar began in the era of the Yellow Emperor. It is generally believed that the lunar calendar, which combines Yin and Yang, was established in the Shang Dynasty, and in 1912, China began to adopt the Western calendar and the traditional Chinese calendar, which is used in parallel, and with the attention paid by the people to the traditional culture, the calendar is of great significance to a country and a nation, and more and more people are supporting the further enhancement of the status of the traditional calendar in China. During the Republic of China period, the "People's Newspaper" founded by the League of Nations adopted the lunar calendar of the Yellow Emperor, and after the Wuchang Uprising, the Hubei military government also adopted the lunar calendar, and the provincial governments followed suit. Sun Wen assumed office as the provisional president of the Republic of China, issued a "change of the calendar to the new year telegram" stipulates that: the Republic of China to use the solar calendar, to the lunar calendar in 4609 years, that is, Xinhai November 13th for the Republic of China first year New Year's Day, the two calendars and use. Lunar calendar as an important carrier of Chinese culture has a far-reaching impact. 2015 National People's Congress proposal, about once again to improve the status of our traditional calendar lunar calendar caused by social debate. Traditional festivals in all regions of China as well as ethnic minority areas are counted on the lunar calendar, and so far most of the countries and nationalities in the Chinese character cultural circle still follow the traditional festivals of the lunar calendar, such as the Spring Festival, the Mid-Autumn Festival, the Dragon Boat Festival, and the Tanabata Festival.

Introduction to the Gregorian calendar:

The Gregorian calendar is also called the solar calendar (Western, New, and National), as opposed to the lunar calendar. The Chinese Lunar Calendar, also known as the Lunar Calendar (Summer, Old, Imperial), is also known as the Taiyin Calendar. The year in the Lunar Calendar is 354 days, calculated on the basis that the moon orbits the earth in one month. The year in the lunar calendar is sometimes 12 months, sometimes 13 months. In years with a leap month, it is 13 months. The year in the Gregorian calendar is 365 days and is calculated on the basis that the Earth orbits the Sun once a year. The time it takes the earth to go around the sun is a little over 365 days and 5 hours. The solar calendar (365 days a year) has more than 11 days more per year than the lunar calendar (354 days a year), and in order to avoid the months of the solar calendar stretching wider and wider from the months of the lunar calendar, intercalary months are used to make up for this. Calendar 19 years 7 leap. Generally the lunar calendar is not the middle of the month, the leap month.

Calculation of Gregorian calendar birthdays:

Some people remember the lunar date of their birth, but don't know the Gregorian calendar date. In fact, the easiest way to do this is to find the year in which someone was born on the almanac, and then find the date of birth noted. Generally, if the date of birth is in front of the date of birth, find the date of birth in the next month of the month in which the birth took place. For example, if a person was born on September 8 of the lunar calendar, look up the calendar for October. If the date of birth is later, look up the date of birth in the last two months of the month in which the birth occurred. For example, if you were born on September 16th, then look up the calendar for November. Of course there are other possibilities.