What festival is the lunar calendar today?

Today is the "slight cold" in the 24 solar terms of the lunar calendar.

In the historical development of China, the 24 solar terms have been incorporated into the lunar calendar and become an important part of the lunar calendar.

Slight cold is the 23rd solar term in 24 solar terms and the 5th solar term in winter. The slight cold solar term is characterized by cold weather, but it does not mean extreme cold.