Purple Mountain Observatory, Chinese Academy of Sciences.
According to the published calendar data, the year 2024 in the Gregorian calendar is a leap year, with 29 days in February, and a total of 366 days in the year.
And the upcoming year of the dragon in the lunar calendar
It is a normal year, with a total of 354 days in the year.
Why the year 2024 in the Gregorian calendar.
12 days longer than the Year of the Dragon
Let's take a look
Why is there a difference in age between the Gregorian calendar and the lunar calendar?
According to experts, the Gregorian calendar and the lunar calendar are two different calendars in astronomy. The difference between the Gregorian and lunar calendars is due to the fact that the two calendars are based on different laws of celestial motion.
Qi Rui, deputy director of the Beijing Planetarium, introduced that the Gregorian calendar is a calendar obtained by observing the movement of the sun. The period of the Earth's orbit around the Sun is known in astronomy as the return year, and this length is the determining factor for the length of the Gregorian calendar. According to astronomical observations, the length of the return year is 3652422 days.
The lunar calendar should take into account the movement of the moon, and the length of the month is based on the change cycle of the moon phase, each cycle is called a synodic month, and the cycle is a little more than 29 and a half days. Therefore, the length of each month of the lunar calendar is 29 or 30 days.
How are common and leap years calculated?
In order to reconcile the difference between the length of the Gregorian calendar and the lunar calendar, the ancients came up with the method of "seven leaps in 19 years". Leap months are set in 7 out of every 19 lunar years, so that there are 13 months with a total of 384 days, i.e. a leap year in the lunar calendar.
According to Qi Rui, deputy director of the Beijing Planetarium, nowadays, China no longer adopts the ancient way of placing intercalation, but more scientifically "when intercalary is intercalary", that is, every 2 to 3 years to increase 1 month, the increase of this month is called "leap month".
If you add one more day in February of the Gregorian calendar, it is called a leap year, or a leap year for short. A leap year means that there are 13 months in the year. ”
Why is 2024 12 days longer than the Year of the Dragon in the Gregorian calendar?
According to experts, the length of a return year is 3652422 days, not a whole number, so in most cases, the Gregorian calendar has 1 leap year every 4 years. Any year in which the number of Gregorian years can be divided by 4 is a leap year, with a year of 366 days. Except for the endless year, it is a normal year, which is 365 days a year. Therefore, 2024 is a leap year.
There are no leap months in the upcoming Jiachen year of the lunar calendar, and there are only 12 lunar months in a year, and the corresponding Gregorian calendar dates are from February 10, 2024 to January 28, 2025, for a total of 354 days. So, the Year of the Dragon in the lunar calendar is 12 days less than the 366 days in the Gregorian calendar in 2024.
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