In issue #1353 it is mentioned that the default value is not displayed in the forms. The reason was that the :formatted_date_value of the date field object was not looking at the default date for new records. I assume that persisted records should take the persisted value. An error will occur if the default date is set as a string, but given separation of logic and display this should not be a problem.
Fix default date value display issue as mentioned in issue #1353
With proper unit tests! Awesome!