Stan,
As a general rule, women start wearing white (and by white I mean anything below the waist like shoes, pantyhose, pants, skirts, or dresses...) from Memorial Day to Labor Day. White blouses, shirts, or sweaters are fine... It's the white below the waist or covering the entire body that is the issue.
Yes, I have learned it is primarily a Southern thing. But, it just looks plain tacky when a women wears white shoes and pants in November.