I'm using CCK with the book content type, as well as the Date module, to add a field so that I can specify the date (insomuch as I know it) for specific events in a biographical chronology. It allows me to choose the granularity of the input, but the problem is that sometimes I know only the year, sometimes I know the year and month, and sometimes I know year/month/day. Is there any way of changing the parameters so that it allows me to have the option of entering the full year/month/day granularity, but with month and day optional? Right now, if I leave out month and day it defaults to "January 1st, XXXX" which is misleading.