I'm having trouble with incomplete historical dates in defining a CCK field, such as if the year and month is known but not the day. If I use either the pop-up calendar or the drop-down list, an entry left blank defaults to 01. If I try to manually type in a date with the calendar such as 2008-05-00 it results in a "date not valid" error. And I have been unable to work out how to get an input box with the widget option "Text field with custom input format" to see whether that will work.
Many thanks in advance.