Has spring sprung?

With football season over, I have nothing to do. So I worked in my front yard for a while. The temperature was in the mid 70s and clear, it was a very nice day. I cleaned out my flower bed, well not really a flower bed, more like a fern and elephant ear bed, since I kill all flowers or plant the darn bulbs upside down. Anyway, as I was cleaning up the leaves and the pecan shells I noticed I have a few daffodils sprouting up. Does that mean winter is over?
It is suppose to be in the 30s again by Friday.