When did the lunar calendar in China and the solar calendar in the world begin to converge?

Our country began to adopt the solar calendar in the first year of the Republic of China (19 12), and now it uses the "combined calendar of yin and yang". The characteristics of the Gregorian calendar are non-overlapping, simple, easy to use and easy to remember. The lunar calendar is different, with overlapping months and leap months, which is more complicated and more difficult to use and remember. Therefore, the festivals in China since the "lunar calendar" are determined by the Gregorian calendar, such as New Year's Day on June 65438+10/October 1, Arbor Day on March 12, and Youth Day on May 4. These festivals are westernized according to the Gregorian calendar. Of course, the benefits of the "lunar calendar" are endless. It not only connects China with the world, but also contributes to social development, national rejuvenation and national prosperity. But connecting with the world does not necessarily change the rules left by our ancestors.