In China, the first month of the lunar calendar is the Spring Festival, which is an important traditional festival. According to the traditional culture of China, the first day of the first month is a day of "offering sacrifices to gods, ancestors and spirits", so it is not appropriate to carry out some secular activities, such as bask in the quilt and washing clothes. This is because these activities will disturb the tranquility of gods and ancestors and are considered to bring unlucky influence.

Therefore, some regions and families will ban bask in the quilt and other activities on the first day of the first month. However, this tradition has been diluted in modern cities, and many people no longer abide by these taboos. If you are in doubt about these traditional customs, it is recommended to consult local elders or cultural experts to understand local customs.