What is the festival between mid-spring and late spring?

The turn of mid-spring and late spring is Tomb-Sweeping Day.

Tomb-Sweeping Day, also known as the outing festival, is on the 108 day from winter to the future, and it is the intersection of mid-spring and late spring. It is a traditional festival in China, and it is also one of the most important festivals to worship ancestors and sweep graves.

Tomb-Sweeping Day started in the Zhou Dynasty and has a history of more than 2,500 years. Tomb-Sweeping Day is the only festival that coincides with the solar terms.