http://collector.zope.org/Zope/30 What are people take on empty dates? Today I can find no way to enter empty dates (I think "None" worked before, but it doesn't work in 2.5.1b1 anyway). This is a problem, because we need to be able to have empty dates. Also, enetering something magick (like None, or 1980/0/0 isn't usable. We fix this with this simple patch, which so far has caused us no problems: from ZPublisher import Converters def fixedfield2date(v): from DateTime import DateTime if hasattr(v,'read'): v=v.read() else: v=str(v) if v=='': return v return DateTime(v) Converters.field2date = fixedfield2date Converters.type_converters['date'] = fixedfield2date It's the "if v=='': return v" part that does it. This makes it possible to enter empty strings as dates. We then handle these as unset dates. Seems to work fine as far as we can see. I was told that this had some type of compatibility issue. If thats the case, how do you suggest we fix it? Best Regards Lennart Regebro Torped Strategi och Kommunikation AB