White Dresses for Graduation - 1949

It's long been a tradition at many schools that the female graduates are required to wear a white dress for the ceremony. I'm not sure of the reasons for this, but here are two pretty choices from 1949.

Left: White dotted swiss with eyelet lace by Nona.
Right: Embroidered organdy with a velvet sash by Junior Accent.

Did you wear white for your graduation?