When is Confucius' birthday?

September 28th, 55 BC1year (August 27th of the lunar calendar).

Confucius (September 28th, 55 BC1year (August 27th, lunar calendar)-April, 479 BC1year (February1/day, lunar calendar)) gave birth to a son whose surname was Kong, and the word was Han nationality, Lu (. China was a thinker, educator and founder of Confucianism in the late Spring and Autumn Period. Confucius is a masterpiece of China's ancient culture, and he was praised as a "heavenly saint" and a "heavenly eye" when he was alive. He was one of the most learned scholars in the society at that time, and was honored by later rulers as Confucius' sage, holy, holy teacher and eternal teacher. Confucius and Confucianism have a profound influence on China, Korean Peninsula, Japanese and Vietnamese areas, which are also called Confucian cultural circles.