How to calculate the birthday? Is it a solar calendar or a lunar calendar?

Lead: Because our country uses two different calendars, Gregorian calendar and Lunar calendar, many people will wonder when calculating the time of birth. How to calculate the birthday? Is our birthday Gregorian or Chinese? In fact, the date of birth in the Gregorian calendar or the lunar calendar can be used, but the way of calculating the time is different.

How to calculate the birthday?

Birthday refers to the time when a child is born, whether it is a solar birthday or a lunar birthday. Both lunar and solar calendars are calendars. To put it bluntly, it is the reference standard for calculating time and date, which is used to guide people's production and life. Especially in ancient times, agricultural production time was instructive. There is no difference between lunar calendar and solar calendar. Because the cycle reference standards of the lunar calendar and the Gregorian calendar are different. So it doesn't make much difference to celebrate your birthday. It depends on your personal habits.

From the Chinese point of view, the significance of the lunar calendar goes far beyond this. Birthday is the so-called birthday in China tradition, which includes four parts: year, month, day and time. Each part is expressed by time, so each part has two characters, which is the so-called birthday. Birthdays are even more significant and useful in ancient times. Even from the eight characters, you can know whether your life is good or bad, mysterious and mysterious. So the birthday of the lunar calendar is even more important. For thousands of years, people in China have celebrated their birthdays in the lunar calendar, but it is only a few years since they celebrated their birthdays in the solar calendar.

So there are differences and connections between the lunar calendar and the Gregorian calendar. For example, if a person was born on X day in 2000 (X day, the lunar year), then in the following years, the Gregorian birthday and the lunar birthday will not be the same day, but in 19, the two birthdays will overlap again (birth in a leap month is another matter). And so on, 38 years old, 57 years old ... all the same.

Therefore, it is actually people's habit to celebrate birthdays in the lunar or solar calendar. You can enjoy any one of them and get used to it. If you are happy, you can spend both. But many people think that the solar calendar is accurate or the lunar calendar is inaccurate, which is obviously a wrong understanding. In fact, both calendars are more accurate, but one is based on the revolution of the earth and the other is based on the change of the moon phase, so the calendars obtained are not the same.

How to celebrate the lunar leap month birthday?

How people born in the leap month of the lunar calendar celebrate their birthdays depends on the specific situation. Because people born in the leap month of the lunar calendar rarely have their own birthdays, they will not be counted until the next leap month. Generally speaking, birthdays and leap months are celebrated in the same month. For people born in August, August is their birthday. Birthdays are celebrated in leap months. If it's the whole ten-day birthday, it should be one month in advance, and a small birthday will do.

Gregorian calendar and lunar calendar are both calendars.

The Gregorian calendar (Gregorian calendar) and the lunar calendar we are using now belong to something called "calendar". The so-called calendar, in layman's terms, is to coordinate the arrangement of years, months and days and define a law or system of time series. Although the establishment of the calendar is based on astronomy, it strictly belongs to the cultural category of "convention", not to the scientific category (what is used to determine the time series in astronomy is called "Julian Day", which is arranged day by day regardless of year). So it is meaningless to say that a calendar is unscientific (online calendar reformers often say that their calendars are more scientific than the Gregorian calendar, which I scoff at).

There is a reason why the calendar depends on astronomical observation. Because the concept of life of year, month and day was originally based on astronomical observation, for example, the time interval between the sun rising twice on the horizon is one day, the time interval between the moon appearing twice on the western horizon in the evening is January, and the time interval between Sirius and the sun rising twice is one year. However, even the most cursory observation shows that the length of a year, a month and a day are not integer multiples. Now we know that 1 tropical year =365.2422 days, while 1 lunar month =29.5306 days. For the ancients, no matter how to arrange them, it is impossible to make the years, months and days closely match, so we can only try our best to arrange the * average length * of calendar years (referred to as calendar months) and calendar months (referred to as calendar months) and tropic years and lunar months. This "trial arrangement" here reflects the cultural differences of the ancients.

People in different cultural regions make their own calendars, which can be roughly divided into three categories: lunar calendar (only considering the laws of lunar movement and calendar), solar calendar (only considering the laws of solar movement and calendar), and yin-yang calendar (considering the laws of lunar movement and solar movement and coordinating their relationship). The Islamic calendar (the origin of hijri) is a typical lunar calendar: the lunar calendar 1 month is missing once, and the set of 1 February is 1 year, so1year has an average of 354 calendar days, regardless of the position of the sun in the sky, so Islamic Ramadan (the origin of hijri is September) is in. The current Gregorian calendar (full name Gregorian calendar, abbreviated as Gregorian calendar, 1582, 10, 15) is a typical Gregorian calendar: there are 365 calendar days in a normal year, 97 leap days in every 400 years and 366 calendar days in leap years, and the position of the moon in the sky is completely ignored, so it is difficult for people to put it.

The so-called lunar calendar in our daily life has two basic components, a calendar month and a solar term. The former reflects the characteristics of the lunar calendar, and the latter reflects the characteristics of the solar calendar, so it is called the yin-yang calendar. Let's start with the calendar month. According to the rules of the lunar calendar, the first month of the lunar calendar is 1 calendar month. As mentioned above, 1 lunar month =29.5306 days, which means that a calendar month is 30 days long and 29 days short. Obviously, if the cumulative mechanical calendar of 12 is 1, then the lunar calendar becomes the lunar calendar just like the origin of Xiji. In that case, we are lucky to have a grand summer and a grand New Year's Day. In order to avoid this embarrassing situation, people who built their country by agriculture in ancient China must consider setting up leap months, that is, in addition to the normal 1 12 months, they should increase some shares every year, that is, 1 month. Through the method of 19 year leap, the average length of 1 calendar year can be adjusted to 365.2469 days instead of 65469 days.