What's the number of 30-49?

Excuse me, what's the number of three nine four nine? The answer is 2736.

March 9 and April 9 refer to the third and fourth cold days from the winter solstice, which is the coldest period of the year. The specific calculation method is 19 every nine days starting from the winter solstice, the first nine days are called 19, and so on, 39 is the third nine days, that is, 27, 49 is the fourth nine days, that is, 36, so it is 2736.

Although 3949 stands for solar terms, due to the vast territory of China, the climate varies greatly from place to place, not all over the country. In most areas, 998 1 day is based on the winter solstice.