In the Gregorian calendar year 400, it was the third year of the founding of the Constitution in the Great Zhou Dynasty. On the third day of February, the world was at peace, and there were no major events throughout the year.
Even if the weather is abnormal, epidemics occur occasionally, and droughts spread to Jiangzuo, given the size of the Zhou Dynasty, such small disasters are unavoidable every year.
In short, three years after the founding of the Constitution, the third day of February was really an ordinary day. However, countless years later, the history was rebuilt, and this day was regarded as the first day of the third era.