What is the date of burning paper twice a year?

Tomb-Sweeping Day and the first day of the 10th lunar month.

In Tomb-Sweeping Day, it rains in succession during the Qingming Festival, and pedestrians on the road are dying. This solar term should be burned as early as possible. On the first day of the tenth lunar month, the traditional cold food festival is coming into winter soon. Burn some paper money to buy cotton-padded clothes for your ancestors.