Hi,
I found in the snapshot of persons-with-significant-control-snapshot-2020-02-01 issues on date_of_birth_year and date_of_birth_month.
In the bulk file eg: CompanyNumber = ‘10792451’, PSC_Id = ‘DkpGaJdWHBesas0hYzzSdWORkdQ’
{“company_number”:“10792451”,“data”:{“address”:{“address_line_1”:“Chadshunt Close”,“country”:“England”,“locality”:“Birmingham”,“postal_code”:“B36 9UB”,“premises”:“53”},“ceased_on”:“2020-01-10”,“country_of_residence”:“England”,“date_of_birth”:{“month”:1,“year”:2020},“etag”:“02d00981a413e091673549049ad7428c20b87653”,“kind”:“individual-person-with-significant-control”,“links”:{“self”:"/company/10792451/persons-with-significant-control/individual/DkpGaJdWHBesas0hYzzSdWORkdQ"},“name”:“Mr Paul Franic Finlan”,“name_elements”:{“forename”:“Paul”,“middle_name”:“Franic”,“surname”:“Finlan”,“title”:“Mr”},“nationality”:“British”,“natures_of_control”:[“ownership-of-shares-75-to-100-percent”],“notified_on”:“2020-01-01”}}
Mr Paul Franic Finlan have date of birth 2020-01 in file and 09/1984 in CH website.