China's new Gregorian calendar, also known as the four-in-one eight-yang change, was written by Yang, a native of Zhumadian, Henan.

Four Calendars and Eight Yang Changes is a new almanac written by an 8 1 year-old man after more than 50 years. Divided into eight equal parts according to 365 days, 5 hours, 48 minutes and 46 seconds of a tropical year. That is, one Yang is in spring, two Yang is in mid-spring, three Yang is in summer, four Yang is in mid-summer, five Yang is in autumn, six Yang is in mid-autumn, seven Yang is in winter and eight Yang is in mid-winter. Every spring is the first Yang Festival, that is, the first day is also New Year's Day, which is the beginning of a year.

There is only one spring in a year, and it will remain unchanged for ten thousand years. Festivals are determined according to the "eight yang changes", for example, the first Yang Festival is determined by solar terms and time, one Yang is in charge of three solar terms, and all three solar terms are adjusted in the local Yang. Every day when a sun enters is the beginning of a solar term. None of the three solar terms leaves the local sun, and each sun fixes three solar terms. According to Bayang, solar terms and time are extremely accurate. On an annual basis, a solar term can't be wrong. (Yang is determined according to the time of solar terms. One Yang tube has three sections, the three sections are based on Yang, and there is one section before entering Yang. Three knots are not healthy, and each knot is solid. According to the Yang Festival on time, the New Year's Day is good. )

This almanac is the shadow of the sun, corresponding to the sun for one second. It is estimated that after 86,400 years, the fixed festivals will remain unchanged year after year, which is accurately calculated by the four-in-one method of "four in one calendar and eight yang changes".

This New Gregorian Calendar of China, also known as Four Calendars of Eight Yang Changes, was written by Yang from Mutun Village, Changxing Township, runan county, Zhumadian City, Henan Province.