The name of which month in some cultures means "wolf month", "cold month"?

January is the first month of the year in the Julian and Gregorian calendars and the first of seven months to have a length of 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere (where it is the second month of winter) and the warmest month of the year within most of the Southern Hemisphere (where it is the second month of summer). In the Southern hemisphere, January is the seasonal equivalent of July in the Northern hemisphere and vice versa.

January is named after Janus, the god of beginnings and transitions in Roman mythology.

Historical names for January include its original Roman designation, Ianuarius, the Saxon term "Wulf-monath" (meaning "wolf month") and Charlemagne's designation "Wintarmanoth" ("winter / cold month").