Continuing the year-long celebration of the 50th anniversary of Ravinia Festival’s Women’s Board, three members of the volunteer group will join forces as guest programmers from 9 to 11 a.m. on Mother’s Day, Sunday, May 13, on Chicago’s only classical station, WFMT 98.7 FM. Chairman Jeanne Denison, Susan Spears and Elizabeth Bergmann will reminisce about their favorite Ravinia moments with host Dennis Moore and play musical selections. Since forming in 1962, the active and innovative group has become the single biggest donor to the not-for-profit Ravinia, contributing more than $25 million and starting the festival’s REACH*TEACH*PLAY education programs.