I had heard it suggested one time that the seasons in the temperate zone should be six rather than four in number: summer, autumn, locking, winter, unlocking, and spring. And I remembered that as I straightened up beside our manhole, and stared and listened and sniffed. There were no smells. There was no movement. Every step I took made a gravelly squeak in blue-white frost. And every squeak was echoed loudly. The season of locking was over. The earth was locked up tight.
It was winter, now and forever.
—Kurt Vonnegut, Cat’s Cradle