Conn. Gen. Stat. § 33-610: Effective time and date of document.

(a) Except as provided in subsection (b) of this section and subsection (c) of section 33-611, a document accepted for filing is effective: (1) At the date and time of filing, as evidenced by such means as the Secretary of the State may use for the purpose of recording the date and time of filing; or (2) at the time specified in the document as its effective time on the date it is filed.

(b) A document, other than the certificate of incorporation of a domestic corporation or a certificate of authority of a foreign corporation, may specify a delayed effective time and date, and if it does so the document becomes effective at the time and date specified. If a delayed effective date but no time is specified, the document is effective at the close of business on that date.