Meaning of Ladies' Day

La'dies' Day"

Pronunciation: [key]
— (often l.c.)
  1. a special day set aside, either occasionally or regularly, on which women are encouraged to attend or participate in a certain activity at a reduced fee or at no cost: Friday was Ladies' Day at the ball park.
  2. a special day on which women are invited or allowed to attend a club meeting or other activity usually restricted to males.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.