Always Receive "Input granularity must include a year." message

Drupal Version: 4.7.3
CCK Version: 4.7.0
Date Version: 4.7.0

When creating a new date field with the content construction kit, I always receive the error "Input granularity must include a year." when submitting changes to the date "Widget Settings" page. I have verified that I have the Year selected under Date Settings->Input Options->Granularity, but I still receive the error.

I see the same result whether I select Date or Datestamp, as well as any of the three formatting options under each of those (Select List, Text Field with strtotime validation, or Text Field with javascript pop-up calendar). I am stuck on the widget settings page, so I'm never sure whether the content is created successfully.

I've attached a screenshot of the error.