Heard some guy on the radio the other day say something along the line of, "...when Winter begins...". He was referring, of course, to the official start of winter on the winter solstice. I believe that's December 21.
I don't see it that way. By my way of thinking Winter starts sometime around late October, definitely by November. Then, Spring starts February 1 and goes through until middle of May. Summer starts sometime from the middle of May. Fall starts mid- September and goes through October.
At least that's the way my mind and body sees it.