[Zope] Date fields in new ZClasses

[Ronald L. Chicheter]

I'm using Zope 2.3.2 and created a ZClass.  I wanted to add a (date)
field as a standard property for the class.  However, unlike the string
properties, I had to include an actual date in the data field.  It gave
me an error when I tried to leave it blank.

Does anyone know why you MUST include a non-null date in a date field of
a ZClass?

Cheers,

Ron