What does the ancient calendar mean?

The lunar calendar and the solar calendar, also called the western calendar, the solar calendar and the solar calendar, are all based on the movement cycle of the earth around the sun, which is 365 days or 366 days a year, starting from New Year's Day.

The lunar calendar, also known as the ancient calendar, the yellow calendar and the lunar calendar, takes the orbit of the moon around the earth as January, that is, the new moon, as the basis for determining the calendar month. Note that the lunar calendar is not a lunar calendar, and there are 354 or 355 days in a year, starting with the winter solstice.

The dry calendar originated in the Xia Dynasty is called the Xia calendar. It is a kind of calendar that adopts the main branch calendar year and then the Gregorian calendar year. There are 24 solar terms in a year, and each solar term is 15 days, about 360 days, starting from beginning of spring.

The lunar calendar is also called dry calendar and summer calendar. The lunar calendar is a kind of calendar, and the change period of the moon phase is the length of the new moon, plus the dry calendar. 24 solar terms? Referring to the tropical year of the sun as the length of a year, the average calendar year is adapted to the tropical year by setting leap months, such as the seventh leap in the nineteenth year. The lunar calendar is a calendar based on the lunar calendar and combined with the solar calendar. There are 354 or 355 days in a year, 384 or 385 days in leap months, and the Spring Festival begins.

Conversion between Gregorian calendar and solar calendar;

New perpetual calendar

1. The advantage of checking the calendar is simple, fast and accurate, but it is not easy to carry.

2. The advantage of formula calculation method is simple, fast and accurate, but the disadvantage is more complicated.

3. The advantage of the formula derivation algorithm is simple, fast and accurate, and the accurate point is that the formula is difficult to remember.

Example 1997 annual trunk-branch line conversion:

View the annual tree trunk and branch map in the perpetual calendar.

1. Look up the calendar: 1997 is the year of Ding Chou.

2. Formula method:

Tiangan formula: the number of years in A.D. is reduced by 3 first, and the rest are Tiangan except 10. The reason why the sky is divided by ten is because ten days is ten.

Tiangan algebra table

1997-3= 1994 divided by 10, and the algebra is called d.

The formula of earthly branches: the number of years in A.D. is reduced by 3 first, and the rest are earthly branches except 12. There is a branch of 12, so it is divided into 12.

Earth branch algebra table

1997-3= 1994 divided by 12, 166 is greater than 2. Look up algebra and you'll know ugliness. Through calculation, we know that 1997 is Ding Chou.

In addition, if the formula of earthly branch is not easy to calculate except 12, you can use this formula to calculate:

1900- 1999 year-end double digits plus 1 minus 12, that is, 1997 is 97+ 1=98-96=2. At the end of 2000- 1999, add 5 to the two digits and subtract the multiple of 12 to get the remainder.

Note: The mantissa of the AD year is less than 3, so it can be supplemented by 10. The sky stem remainder is zero, which means decimal, and the ground branch remainder is zero, which means 12, which means sea.

The calculation formula of BC:

Annual stem =8-N(N= the number of years divided by the remainder of 10, that is, the single digits of the number of years)

Ground branch = 10-N(N= number of years divided by the remainder of 12)

Comparison table of twelve earthly branches and twelve zodiac signs

The twelve earthly branches correspond to the zodiac. 1997 is the year of Ding Chou, and the ground supports ugliness. Look up the table, ugliness corresponds to cattle, 1997 is the year of the ox.

Formula for calculating annual stems and branches

From the palm of your hand, you can count the annual stems and branches, and the flowers in Zhi Zi begin.

Yangzhi began on the 10th and lasted for four years.

Every other position is reversed for ten years, and the end of the year is 503.

Sixty numbers are added and subtracted one by one, and thousands of years are counted in the palm of your hand.

Monthly dry and monthly branch calculation: calculate after converting the solar calendar into the lunar calendar. The conversion between solar calendar and lunar calendar is very complicated. For general application, I will remember that the simplest thing is to look up the perpetual calendar. For example, the solar calendar is1August 997 16, and the lunar calendar is1July 14th 997. The calculation is based on July.

Check the monthly branches in the perpetual calendar.

1. Check the calendar, such as 1997, August 16, the seventh month of the lunar calendar is Wushen, and the main branch is Wushen.

2. Formula method,

The formula of monthly dryness is: monthly dryness = annual dryness ×2+ monthly dryness 65438+August dryness 0997 = 4(65438+ daily dryness 0997) ×2+7 (lunar calendar) = 15. If it is greater than 10, divide it by 10, which is known by algebra.

The branch of the moon and the earth is fixed, calculated according to the lunar calendar. As shown above, January is silver moon, February is Uzuki, March is Chen Yue, April is Mitsuki, May is noon, June is non-month, July is Shen Yue, August is unitary month, September is full moon, October is sea month, November is Asian month and December is ugly month. For example, August 1997 16 is July 14th of the lunar calendar, and the July branch is Shen, so the sun and moon branch of August 1997 is Wu Shen, which is consistent with the perpetual calendar.

12 construction comparison table

December architecture: that is, the corresponding relationship between the lunar month and the twelve earthly branches has the following principles.

(1) Set the month where the winter solstice is located as the sub-month, which is about the winter month, that is, November of the lunar calendar, and the next month is called the ugly month, that is, December of the lunar calendar.

(2) In the ancient calendar, the first month of the summer calendar was silver moon, also called Yin Jianyue or Yin Jianyue.

(3) Architecture: The ancients determined the orientation according to the bucket handle direction of the Big Dipper, and in the first month, the bucket handle of the Big Dipper pointed to the cloudy direction, so it was said that it was cloudy in the first month.

(4) The first month is the beginning of a year, or silver moon is the beginning of a year.

3. The formula of dry month is "five tigers capture", and the formula is as follows:

The first year of A's birth, the year of C's birth and the month of A's birth are C's.

The year of B Geng was the first year of the Reform Movement of 1898, the year of B Geng was heavenly stem, and the month of Tiangan was the year of the Reform Movement of 1898.

Bing Xin must look for Geng Xu. Three years is the year of Xin Si, and the month is the year of Geng Xu.

The year of Ding Nian is the year of Ding Ren, and the year of crossing the sky is the year of Ren.

You ask Wu Gui which way to send Jia Yin, so that you can chase after the years of drought.

Heavenly stems and earthly branches algebra table

The ground support is fixed on the table.

The above is about the search of lunar calendar and solar calendar, and it is about the sharing of perpetual calendar. Read the authentic calendar book, I hope this will help everyone!