What's the difference between the lunar calendar and the solar calendar? How to convert them?

The first day of each month is called the new moon, and the last day is called darkness. The fifteenth, sixteenth or seventeenth day of the lunar calendar is called Wangwang, and the day after Wangwang is called Wangwang, so New Year's Eve of the lunar calendar is not the same day every year. The basis of the lunar calendar is the year of the tropic of Capricorn and the first month. The tropic year is the time required for the sun to pass through vernal equinox twice in a row, that is, 365.2422 days (365 days, 5 hours, 48 minutes and 46 seconds). "The first month of the lunar calendar" is the time between two consecutive new moons (new moons) or two full moons (full moons), that is, 29.5306 days (June 29th 12 hours, 44 minutes and 3 seconds).

Because 12 "Wang Shuoyue" is only 354.3672 days, which is more than 10 days different from 365.2422 days in the tropic year, this difference adds up to a leap month. As early as the Spring and Autumn Period in 5600 BC, China calendar adopted the arrangement of seven leap months in 19 years.

However, the calculation method of the lunar calendar in China is different from that in Tibet and South Korea, and there is generally a difference of one or two days.

The date of the lunar calendar is based on the full moon, and each new moon is the first day. The full moon is 15th (16th) and 29th (30th). However, at present, the date of the solar calendar is usually used to express the time. If you want to convert the date of the solar calendar into the date of the lunar calendar, you can use the following two methods: one is to search the newly edited perpetual calendar, for example, what is the date of the lunar calendar on June 8, 1984? Open the perpetual calendar, 10 June is the eleventh lunar month, so it is inferred that June 8 is the ninth day of the ninth lunar month. Secondly, we can use the formula to calculate the lunar calendar date:

Suppose: the number of AD years-1977 (or1901) = 4q+r.

Then: Lunar date =14q+10.6 (r+1)+date ordinal of the year-29.5n.

(Note: in the formula, q, r and n are all natural numbers, r

For example: Lunar date1May 7, 994 is:

1994- 1977= 17=4×4+ 1

So q = 4, r = 1, so the seventh day of the fifth lunar month is:

14×4+ 10.6( 1+ 1)+(3 1+28+3 1+30+7)-29.5n

= 204.2-29.5 Newton

Then divide 204.2 by 29.5 to get the quotient 6...27.2, where 6 is the value of n and the remainder 27 is the 27th day of the lunar calendar. /hy/lhy/timedetail . ASP