20 19 February 16 what's the date of the lunar calendar?

The lunar calendar is the lunar calendar, and the length of the calendar month in the lunar calendar is subject to the first month of the lunar calendar. 30 days in the first lunar month and 29 days in the second lunar month. The first lunar month and the second lunar month complement each other, making the average length of calendar months close to the first lunar month.

Lunar New Moon is the first day of the month-the first day of the month. Astronomically speaking, the so-called "new moon" has a definite moment, that is, the longitude of the moon is the same as that of the sun (the calculation of the longitude of the sun and the moon is very complicated, so I won't introduce it here).

As for the basis for determining the name of the lunar month, it is determined by "Zhongqi". That is, the month containing "rain" is January; February is a month with "vernal equinox"; March is the month of Grain Rain; April is a month with "small fullness"; May is the month of "summer solstice"; June is the month of "great summer heat"; The "summer heat" month is July.

August is the month of autumnal equinox; September is the month of "first frost"; 10 is the month of "light snow"; 1 1 month is the month of "winter solstice"; December is a "cold" month (the month without gas is the leap month of last month).

The size of the lunar month is very irregular, sometimes two, three, four big months or two three small months are connected together, and the length of the calendar year varies greatly. The distribution dates of solar terms and gas in the lunar calendar are very unstable and vary greatly. In this way, the lunar calendar seems very complicated.

The lunar calendar still has a certain cycle law: because the number of days in 19 tropic year is almost equal to that in 19 lunar year, the lunar calendar is almost the same every 19 year. Every nineteen years, the Gregorian calendar days on the first day of each month in the same month of the lunar calendar are generally the same or one or two days apart. Every nineteen years, solar terms and neutral dates generally repeat, with individual differences of one or two days. The months separated by 19 leap month are repeated or differ by one month.

The lunar calendar determines the moon according to the law of its movement: the orbit of the moon is called the white road, and both the white road and the ecliptic are two great circles on the celestial body, which intersect at five degrees and nine minutes. The moon goes around the earth and appears on the ecliptic twice, which lasts for 7 hours and 43 minutes 1 1.5 seconds on the 27th, and is called "Stellar Moon".

Only when the moon revolves around the earth, the position of the earth also changes. The forward count is more than 27 degrees, and the moon runs 13 degrees 15 minutes every day, so it takes 12: 44: 2.8 to return to the moon on the 29th, which is called "the first moon", and it is called the moon according to customs, which means the first moon.