What is the legend of the Cold Clothes Festival? Is the burning of cold clothes on the Cold Clothes Festival in the morning or in the afternoon?

What is the legend of Cold Clothes Festival?

Because of the story of Meng Jiangnu who traveled thousands of miles to find her husband and send him winter clothes, the first day of the tenth month of the lunar calendar is called "Cold Clothes Festival" both inside and outside the Great Wall. "Burning winter clothes on the first day of October" has long become a custom in the north to pay tribute to deceased relatives.
Legend of Hanyi Festival: Originated from the Winter Welcoming Ceremony of the Pre-Qin Dynasty

According to the Book of Rites, the tenth month of the lunar calendar is the month of the beginning of winter. On this day, the emperor led the three dukes and nine ministers to the northern suburbs to hold a winter welcoming ceremony. After the ceremony, they returned to reward those who died for the country and provide relief to their wives and children. How can the dead be rewarded? "Sending winter clothes" to them should be the natural consequence of the reward, and this practice will be followed by others and become a custom.
Legend of Cold Clothes Festival: Legend of Zhu Yuanzhang "giving clothes"
The tenth month of the lunar calendar was an important month in ancient times, as it was the time when rice was harvested and stored in warehouses. “In this month, the emperor began to wear fur clothes” (The Book of Rites, Monthly Ordinances). The emperor used the ceremony of wearing winter clothes to announce to the common people that winter had come.

Should the burning of winter clothes be done in the morning or afternoon on the Cold Clothes Festival?