How are the solar and lunar calendars converted?

Gregorian calendar and lunar calendar cannot be converted, and the calculation methods used are different. There is no special relationship to query, so it can only be calculated separately.

Gregorian calendar is a kind of solar calendar, which is based on the movement cycle of the earth around the sun.

Gregorian calendar, also known as AD, Gregorian calendar, AD, etc. , a calendar originated in western society, was formed by Italian doctor and philosopher aloysius Lilius who reformed julian calendar. 1582, the then Pope Gregory XIII approved the promulgation, taking the year of Jesus' birth as the beginning of the calendar.

The Gregorian calendar is the average solar calendar, with only the tropic year, regardless of the new moon. The time for the earth to go around the sun is 365.2422 days, so it will lose about 1 day every four years on average.

Therefore, the Gregorian calendar stipulates that there are 1 leap year every four years, and this day plus February with the least number of days, so February in leap year has 29 days. In practice, for convenience, it is stipulated that all years that can be divided by 4 (years with two zeros at the end should be divided by 400) are leap years. For example,1996,2000 is a leap year.

The lunar calendar is also a "yin and yang calendar", also known as the summer calendar, the lunar calendar and the old calendar, which is one of the traditional calendars in East Asia. The lunar calendar belongs to a kind of lunar calendar, and an average calendar month is equal to a new moon. However, the leap month is set to make the average calendar year a tropic year, and the 24 solar terms are set to reflect the changing characteristics of the seasons (the annual movement of the direct point of the sun), so there is also a solar calendar.

Normal year 12 months, 30 days in the big month, 29 days in the small month and 354 or 355 days in the whole year. Because the number of days in each year is about eleven days worse than that in the solar year, the method of setting leap months is adopted to exhaust the average number of days in these years.

Like the lunar calendar, 19 has seven leap months. But different from the lunar calendar, according to the position of the sun, a solar year is divided into 24 solar terms to facilitate agricultural planting and other activities. The chronology is matched with heavenly stems and earthly branches, with a period of 60 years. According to legend, this calendar originated in the Xia Dynasty, so it is also called the Xia calendar. Also known as the old calendar.

This leads to the different starting months of the lunar calendar and the lunar calendar. The lunar calendar takes the first day of the first month as the starting point of a year, while the lunar calendar is divided according to the 24 solar terms, which means that beginning of spring is the starting point of the lunar calendar.

Extended data

solar calendar

The solar calendar is the solar calendar, which is calculated according to the movement period of the earth around the sun. There are 12 months in a year, and this "month" has nothing to do with the new moon. The month and date coincide well with the position of the sun on the ecliptic, and the changes of cold and warm seasons can be clearly seen in a year.

traditional Chinese calendar

The lunar calendar, also known as lunar calendar, is a calendar in which the moon orbits the earth for one month, that is, the moon is the basis for determining the calendar month.

Because the new moon is easier to observe than the tropic of cancer, almost all ancient calendars are lunar calendars. However, the length of the first lunar month (29.5306 days) is the average of one month, which is 12 months in the whole year, which is about 10 days and 2 1 hour different from the tropical year (365.2422 days). So we need to set up leap months, three years and one month, five years and two months, and nineteen years.

Baidu encyclopedia-Gregorian calendar

Baidu encyclopedia-lunar calendar

Baidu encyclopedia-Gregorian calendar

Baidu encyclopedia-lunar calendar