What's the festival before Tomb-Sweeping Day?

The festival before Tomb-Sweeping Day is Cold Food Festival.

Cold Food Festival: 15 Summer to the future, one or two days before Tomb-Sweeping Day. When the first day of the day is a holiday, smoking is forbidden and only cold food is eaten. In the development of later generations, the customs of sweeping, climbing, swinging, cuju, crochet and cockfighting were gradually increased. The Cold Food Festival lasted for more than 2,000 years and was once called the largest folk festival in China. Cold Food Festival is the only traditional festival of Han nationality named after food customs.