What month is it?

What a beautiful day -- sunny and in the upper 60s -- a far shot from a typical January day in New York. It felt like one of the first days of spring, when people roll down their windows, shed the layers of extra clothing, and just breathe. It's so nice, yet it also seems wrong, and a little scary. I don't really know what's causing this mild weather here and around the country. Although forecasts say it won't last too much longer, and this day will soon be forgotten.