Guess which dynasty the winter solstice festival originated from.

Because Emperor Wu of the Han Dynasty abandoned the weekly calendar and re-adopted the summer calendar (lunar calendar) as the legal calendar of the country, the winter solstice was separated from the first month and officially became an independent festival, which also influenced future generations for more than 2,000 years. The custom of winter solstice originated in Han Dynasty and flourished in Tang and Song Dynasties. Until now, there is a folk saying in our country that the solstice in winter is as big as a year, which shows that people attach importance to this festival.