Which festival in China does Smart Festival refer to?

"Smart Festival" is another name for Tomb-Sweeping Day. Because "Qingming" and "Smart" are homophonic, Tomb-Sweeping Day is also called "Smart Festival".

Tomb-Sweeping Day is one of the twenty-four solar terms in China lunar calendar, after the vernal equinox and before Grain Rain. According to the explanation of the differentiation of China's festival custom series, Tomb-Sweeping Day is also called "paranormal festival" because Qingming and paranormal are homophonic.

Extended data:

The reason why the ancients called Tomb-Sweeping Day "Smart Festival" is to make people smart through this festival. April 1 day is April Fool's Day in the West. On this day, anyone can fool others for fun, so lies are everywhere.

However, "Wisdom Festival" is different. When the spring breeze blows, your mind becomes enlightened, you want to understand what you don't want to understand, and you do what you don't do well. The environment is "clean", people's hearts are "clean", life is "fresh" and society is "upright", giving people a harmonious and warm feeling.

Baidu Encyclopedia-Tomb-Sweeping Day