This is the 166th most frequent Swedish word.
december
December: The twelfth and last month of the year.
Here, 'december' is used as a proper noun, the name of the month.
December är den sista månaden på året.
December is the last month of the year.
In this sentence, 'december' functions as a time reference, indicating when an event occurs.
I december firar vi jul.
In December, we celebrate Christmas.
The word 'december' here conveys the time of year in general terms, emphasizing its characteristic weather conditions.