I wonder if the warm weather lately hasn't made you neglect a bit your preparations to deal with the cold.There's going to be a great cold wave after tomorrow. You would do best to prepare yourself.
A commemorative day set to this date by the "Association of Listeners to the Angel's Whisper" because it was the day in which the coldest minimum temperature of -41.2ºC was registered in Hokkaidou, back in 1978! (angel's whisper refers to diamond dust)
Funnily enough, the temperature in Fahrenheit has roughly the same value: -41.2ºC = -42.16°F