The last month in the calendars of the Men of Middle-earth, approximately equivalent to modern December (though in fact running from modern 21 November to 20 December). The Sindarin name was Girithron.
The word obviously contains the word ringa "cold". David Salo notes that the ending might be also seen in the abstract nouns almare "blessedness" and fanyare "the skies". Therefore the meaning of Ringare is equivalent to "*coldness".