Questions about birth date and constellation

If the birthday on the ID card is correct, that date is in the solar calendar, and this is the constellation. Then you are Aquarius.

Aries: March 21~ April 20

Taurus: April 2 1 to May 2 1.

Gemini: May 22nd to June 2nd1

Cancer: June 22nd to July 22nd.

Leo: July 23rd to August 23rd.

Virgo: August 24th to September 23rd.

Libra: September 24th ~ 65438+1October 23rd.

Scorpio: 65438+1October 24th ~165438+1October 22nd.

Sagittarius:165438+1October 23rd to 65438+February 2nd1

Capricorn: 65438+February 22nd ~ 65438+1October 20th.

Aquarius: 65438+1October 21~ February 19

Pisces: February 20th to March 20th.

The solar calendar is the solar calendar and the lunar calendar is the lunar calendar.

For example, the Lantern Festival on 20 10, the first month of the lunar calendar is 15, and the solar calendar is February 28. In fact, it's all one day, but the algorithm is different.

The solar calendar is a calendar based on the movement of the earth around the sun. It takes one revolution of the earth around the sun as a year. The length of a tropical year is 365.2422 days, that is, 365 days, 5 hours, 48 minutes and 46 seconds. In four years, there are 23 hours 15 minutes and 4 seconds, which is roughly equal to one day, so every four years, 1 day is added, and 366 days are obtained at the end of February, which is a leap year. But four years plus 1 day actually adds 44 minutes and 56 seconds to the tropical year. When the product reaches 128, one more day is counted, that is, 400 years is counted as three more days.

The leap year in the solar calendar stipulates that if the number of years in AD can be divisible by 4, it is considered a leap year. In order to subtract three days from more than 400 years, when the number of years in A.D. is a multiple of 100, leap years can only be considered if they are divisible by 400, such as 1600, 2000, 2200 and 2400. In this way, three days were cleverly subtracted from four hundred years. The solar calendar stipulates that every year is 12 months, and the size of the month is completely artificial. Now it is stipulated that every year 1, 3, 5, 7, 8, 10,1February is the big month, and every month is 3 1 day; April, June and September 165438+ 10 are abortion, with 30 days per month; February in a normal year has 28 days and leap year has 29 days.

The lunar calendar is revised according to the cycle of the moon phase (that is, the new moon). Because the ancients called the moon lunar, the lunar calendar is also called lunar calendar, which is a pure lunar calendar. Our country uses the "lunar calendar" and most people call it the "lunar calendar", which is wrong. The lunar calendar is not a pure lunar calendar, but a "yin and yang calendar".

The lunar calendar takes the full and short periods of the moon as one month, and 12 months as one year. However, the moon has a full moon, which is 29 days, 12: 44: 3, which is more than 29 days and less than 30 days. For convenience, the lunar calendar divides months into big months and small months. There are 30 days in a single month, 29 days in a bimonthly month and 354 days in a year.

In fact, the new moon is not exactly equal to the average of the big moon and the small moon-29 days and a half, but 44 minutes and 2.8 seconds more than 29 days and a half. So 12 moon is actually 8: 48: 34 more than 354 days, and it will be more 1 1 day in 30 years. So 1 1 leap year will be inserted in the 30 years of the lunar calendar. Every leap year is an extra day in 65438+ February. The leap year in the lunar calendar is 355 days. In this way, the lunar calendar has 19 354 days and 1 1 355 days every 30 years, and the average length of a year is 354 days, 8 hours and 48 minutes. Its year is almost shorter than the tropical year 1 1 day. In three years, we lost more than a month, and 17 lost more than half a year. So with this length of time, the New Year doesn't have to be spent in winter, but it can be spent in spring, summer and autumn. Its only advantage is that you can know the shape of the moon from every date of the lunar calendar.

As a calendar, the lunar calendar is not in harmony with agricultural production and people's daily life, so in today's world, except for a few Islamic countries that are still in use for religious reasons, other countries have generally abandoned it.

The lunar calendar takes the time of the first month of the lunar calendar as the average time of the calendar month. This is the same as the pure lunar calendar, but the lunar calendar adopts the method of setting leap months and 24 solar terms, so that the average length of the calendar year is equal to the tropic year, which has the elements of the solar calendar, so it is better than the pure lunar calendar.

The current lunar calendar is said to have been used by our ancestors as early as the Xia Dynasty (before17th century BC), so people also call it the "summer calendar". It was still called "Summer Calendar" after liberation, and was renamed as "Lunar Calendar" in China after 1970. As for the origin of the name "lunar calendar", it is probably because the country has been founded on agriculture since ancient times, so the calendar must serve agriculture.

The lunar calendar is based on the new moon. The time of the first lunar month is 29th 12 hours, 44 minutes and 3 seconds (that is, 29.5366 days), so the lunar calendar is also 30 days for the big month and 29 days for the small month, but it is not exactly the same as the pure lunar calendar, because the pure lunar calendar is arranged alternately with big and small months, and the size and month of the lunar calendar are determined by calculation.

The first day of each month in the lunar calendar happens to be a "new moon" (that is, the moon is in the middle of the sun and the earth faces the earth with half of the darkness). Sometimes there may be two big months or two small months in a row. Because the first month of the lunar calendar is slightly longer than 29 and a half days, there are about 53 big months and 47 small months in every 100 calendar month of the lunar calendar.

The lunar calendar basically takes 12 months as a year. However, the time of 12 moon is 354.3667 days, which is about 1 1 day different from the tropic year. This will add 33 days every three years, that is, an extra month.

In order to eliminate the extra days, one month is added every three years, which is the leap month of the lunar calendar. This leap month is also called leap year. Therefore, the lunar leap year has 13 months. As for the leap month, it is determined by the solar terms.