extreme cold; bitter cold
General term for the coldest period of winter, often used in weather reports or seasonal descriptions.
In this season of bitter cold, I hope everyone is doing well.
Major Cold solar term
The 24th solar term in the traditional East Asian calendar, starting around January 20 and marking the coldest time of the year.
See also: 二十四節気
Daikan is one of the 24 solar terms and is considered the coldest period of the year.