Conn. Gen. Stat. § 7-54

(b) The adoptive parent or parents of an adopted person born outside of the country and adopted by a resident of this state, or such adopted person if eighteen years of age or older, may apply to the probate court for the district in which the adopted person resides for a determination of the biological age and date of birth of the adopted person. The probate court shall hold a hearing on the application and receive medical and other evidence relevant to the issue of biological age and date of birth of the adopted person. After such hearing, the probate court may issue a decree to establish the biological age and date of birth of the adopted person. If the biological age and date of birth established in the decree is different from the biological age and date of birth in the certification of birth registration or a certificate of foreign birth, the probate court shall provide a certified copy of the decree to the department. Any certification of birth registration or certificate of foreign birth issued by the department pursuant to subsection (a) of this section after the date the department receives such decree shall reflect the date of birth in such decree.