The twenty-four solar terms of the opening ceremony of the Winter Olympics turned out to be the solar calendar compiled by the ancestors?
Spring equinox, summer solstice, autumn equinox, winter solstice, do you remember the countdown to the opening ceremony of the Winter Olympics? Anyone who has studied geography knows that this is the day when the sun shines on the equator and the Tropic of Cancer. These four words are both four of the twenty-four solar terms and are identical to the corresponding Gregorian dates and geographical concepts, namely the twenty-first days of March, June, September, and December.
This is the solar calendar created by the ancient working people of the mainland. The twenty-four solar terms not only conform to the operating rules of the solar rotation, but also integrate phenology, meteorology, etc., and are praised by the international meteorological community as "China's fifth major invention".
In ancient times, people created a lunar calendar, also known as the lunar calendar, by observing the cycle of the moon's full circle. During the period of Emperor Wu of the Han Dynasty, a relatively complete rule was determined, that is, the "Han Calendar", and some experts pointed out that it is most appropriate to call it "Han Calendar".
In addition to observing the changes in the phases of the moon, the wise ancestors also observed the position of the Big Dipper and the length of the shadow of the sun, and realized that the period of change in the shadow of the sun was more stable, about 365 days.
The lunar calendar also has a disadvantage, the cycle of the moon phase is more than twenty-nine days, although the large month is set up for thirty days, the small month is twenty-nine days, and the year is only 354 days, which is about eleven days less than the cycle of the sun shadow. About three months is about a month apart. What to do? Adjustment by setting leap years: 30 years for a cycle, of which eleven years are leap years, one month more than usual.
Although the lunar calendar can also return to the cycle of the sun after adjustment, the ancestors who strive for excellence find that this calendar brings great inconvenience to agricultural life: when is it better to sow seeds? Last year was the 20th of March in the lunar calendar, and if the leap Month of February this year, the weather has warmed up on the 20th of March of the lunar calendar, and it will be too late to plant.
On the other hand, every year when the peach blossoms bloom and when the swallows fly south are relatively stable, and the cycle of the change of the sun shadow overlaps, so slowly explored another set of seasonal systems, the one-year cycle is the same as the current solar calendar, the naming pays attention to the corresponding to the farming season, and the image is easy to remember.
In addition to guiding farming, the twenty-four solar terms also contain the philosophy and health care method of harmonious coexistence between man and nature. For example, during the Lixia season, there is a proverb in Jiangnan: Thousands of supplements are not as good as Lixia one supplement.
Dear reader, do you remember a proverb related to the twenty-four solar terms? Feel free to leave a message in the comments section.
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