What day is Tomb-Sweeping Day?

What you want to ask is the date of Tomb-Sweeping Day? April 4th or 5th of Gregorian calendar.

Tomb-Sweeping Day falls on April 4th or 5th, and Tomb-Sweeping Day is a solar term in the lunar calendar. At the turn of mid-spring and late spring, that is, 108 days from winter to the future, the time when the sun reaches 15 degrees is not fixed, so the time in Tomb-Sweeping Day is April 4 or 5.

Tomb-Sweeping Day has two connotations of nature and humanity, which are both natural solar terms and traditional festivals. Qingming is one of the twenty-four solar terms and the fifth solar term in spring.