Values collected in prior version of OpenClinica would be stored in the format specified by the users locale. The default format in the user interface for DATE and PDATE in OpenClinica is DD-MMM-YYYY. The default format in the user interface for DATE and PDATE in OpenClinica is DD-MMM-YYYY. Therefore, when only a month and year are provided in a PDATE field, the value in the database would be MMM-YYYY. This is the only format that will be updated automatically by a liquibase script when OpenClinica is upgraded to Amethyst. A separate script will need to be created to identify and update values in a different format.
For all partial dates stored in MMM-YYYY format, the liquibase script will convert the values YYYY-MM in order to conform to the ISO 8601 standard date format.