"The shortest day has passed, and whatever nastiness of weather we may look forward to in January and February, at least we notice that the days are getting longer. Minute by minute they lengthen out. It takes some weeks before we become aware of the change. It is imperceptible even as the growth of a child, as you watch it day by day, until the moment comes when with a start of delighted surprise we realize that we can stay out of doors in a twilight lasting for another quarter of a precious hour."