Is April 3 rd a cold envoy? Does this solar term say you can't sweep graves?

This is Tomb-Sweeping Day. I thank you. How can you not sweep the grave?

Cold food festival, that is, cold food festival, also known as "smoke-free festival", "cold food festival" and "Hundred Five Festival". One hundred and five days after the summer solstice, and one or two days before Tomb-Sweeping Day. Smoking is forbidden and only cold food is eaten on this day, so it is called "Cold Food Festival". In the development of later generations, the customs of sweeping, hiking, swinging, cuju, holding hooks and breaking eggs gradually increased. The Cold Food Festival lasted for more than 2,000 years and was once called the largest folk festival. Many scholars have written poems about the Cold Food Festival.