When we celebrate our birthdays every year, why do most people celebrate the lunar calendar instead of the solar calendar?

Do you celebrate your birthday in the solar or lunar calendar? This question feels like a paradox. We live in the solar calendar every day, but our birthdays are based on the lunar calendar.

The lunar calendar was handed down from the older generation, which seems to have existed since ancient times. I feel that the lunar calendar is more accurate than the solar calendar.

To understand this problem, you have to understand the origin of the solar calendar and the lunar calendar, as well as the yin-yang calendar.

First of all, you should know that both the solar calendar and the lunar calendar are timing algorithms. Then the solar calendar takes the sun as the center (that is, the earth rotates) and the lunar calendar takes the moon as the center (that is, the earth rotates).

The solar calendar is also the Gregorian calendar, which is internationally accepted. This calendar is saturated with the civilization created by human beings for thousands of years. It was learned by the ancient Romans from Egyptology and spread all over the world with the expansion of the Roman Empire and the rise of Christianity.

The earliest source of solar calendar can be traced back to the solar calendar in ancient Egypt.

The Nile is the lifeblood of Egypt, and it is precisely because of the need to calculate the flood cycle of the Nile that astronomy and solar calendar in ancient Egypt came into being.

Seven thousand years ago, they observed that the day after Sirius first rose at the same time as the sun, the Nile began to flood fifty or sixty days later.

So they take this day as the beginning of the year. The first year was set at 360 days, and then changed to 365 days. This is the first solar calendar in the world.

The Gregorian calendar is customized based on the time that the earth revolves around the sun for one year, ***365 days, 5 hours, 48 minutes and 46 seconds. The average year is only an integer of 365 days, not a mantissa; A year is divided into 12 months, big month 3 1 day, small month 30 days, and February only has 28 days.

The mantissa of four years accumulates to *** 1 day, and is added to February of the fourth year, which is called leap year. So February in leap year has 29 days.

The lunar calendar is one of the traditional calendars in China, also known as the lunar calendar, the Han calendar, the yellow calendar, the summer calendar and the old calendar.

In the ancient feudal period, China was mainly a farming civilization, and all previous dynasties emphasized agriculture over commerce. The harvest of crops is inseparable from the calculation of seasons.

In ancient astronomy in China, it mainly refers to the calendar arranged according to the phase period of the moon, with the moon orbiting the earth as one month and a year as twelve calendar months.

In the process of calendar development and evolution, the emergence of 24 solar terms was used to scientifically guide agricultural production, and the lunar calendar (Han calendar) was formed. (Oh, I just arrived in beginning of autumn these two days)

The lunar calendar is based on the time when the moon is full and short, and it is customized for one month, ***29 and a half days. For the convenience of calculation, the big moon is customized for 30 days and the small moon is customized for 29 days. In 12 months of a year, large and small months are generally arranged alternately. The lunar calendar has only about 354 days a year, and there is no difference between a normal year and a leap year.

Because the lunar calendar does not consider the movement of the earth around the sun, the changes of the four seasons in the lunar calendar have no fixed time and cannot reflect the seasons.

In order to overcome this shortcoming, people later decided on a compromise calendar, the so-called yin-yang calendar. The summer calendar still in use in China (some people call it lunar calendar or lunar calendar) is this kind of lunar calendar.

Like the lunar calendar, it also customizes a month according to the time when the moon is full and short, which is 30 days for the big month and 29 days for the small month. However, it also adopts the method of adding leap months to make the average number of days in each year close to the number of days in the solar calendar to adjust the four seasons.

Every two or three years, there will be an extra leap month in the summer calendar. That's why sometimes people have birthdays twice a year. However, before the founding of New China, China always used the lunar calendar. Therefore, people often celebrate the Lunar Birthday.

The wheel of history has turned to 2 1 century, and there are still many seemingly unreasonable but reasonable things in our daily life.

Remember the philosopher Hegel's sentence "Being is reasonable"? Although it belongs to idealism, it conforms to the law of true fragrance.

In fact, these "paradoxes" have experienced thousands of turns in the long river of history.

The "yes" in this "paradox" is the memory of our ancestors and the precipitation of China culture. It is precisely because of the precipitation of history that our Chinese culture has become more and more thick and shining.

Welcome to pay attention to @ Falling Flowers and Rain Bookstore, record life with words, and resist the long years with love.