the coldest day
It might be easier to write this by the power of writing Japanese one.
It's the coldest day in this winter today. So I'm enclosed in my room. My stove is powered by some oil, not by electricity or gas. It's enough to warm up my small room. Because I stayed up all night, I'm looking for the time to go to bed. Of course, I'm sitting on the bed because my bed is in place of the chair.
According to the weather report, the Siberian cold air mass is coming to Japanese islands. Actually, sort of strong wind blows hard. I don't like to open the window, so I don't know the actual coldness.
But, probably after this strong wind stopped, I'll have to open the window once to change the air.