The importing and exporting of partial date values is permitted, as long as the relevant date field(s) in the form(s) are configured to allow partial dates - this includes all standard export formats offered by Castor.  

To import the partial dates, the data should conform to the following formats:

• Partial-date, missing day - UK-MM-YYYY
• Partial date, missing month and day - UK-UK-YYYY

When exporting, date data configured to allow partial entries will also be exported in the formats above.

To know if your field is configured to allow partial dates, visit the page The 'Date' field.

To learn more about validating partial dates visit the articles: Entering and managing partial dates in Castor CDMS and Validating partial dates NK/MM/YYYY.