"Winter Dreams" discussion Why winter for the title? Why not spring or fall? How do seasons affect Dexter's outlook on life?

Dexter's dreams of a life of grandeur begin in the winter when he is unable to caddy at the Sherry Island golf club because of the seasonal shutdown of the course.  Because he has spent the spring, summer, and fall among the successful, wealthy, and socially prominent club members, he has had an introduction into a social milieu that he wishes to one day surpass.  Dexter's reveries take place as he cross-country skis across the fairways. He dreams of besting Mr. T. Hedrick in a round of golf and astonishing Mr. Mortimer Jones by strolling into the lounge; he also thinks of diving from the club's raft.  He wants to impress the wealthy people he toils among, but he does not want to befriend them.
Dexter becomes energized in the fall when his memories of summer are still vivid.  The memories give way in the winter to his various fantasies and daydreams.  In Minnesota, the spring comes so suddenly that Dexter has no time for reflection; the golfers begin to fill the course in April, and his work begins anew. The period when Dexter can devote himself to vague but deeply-felt plans is only in the lull of winter.
At the story's end, after Dexter has achieved significant financial and social success, he is sad to understand that he has lost his capacity to care; he is disillusioned and knows he will never recapture the promise of the winter dreams he had as a boy.