§ 2. Hours in session. No session shall be held between 12:00 A.M. and 8:00 A.M.; provided, however, that the Senate may remain in session to complete action on a measure or measures upon which debate was begun prior to 12:00 A.M. or to act on a measure or measures for which a message of necessity has been received from the Governor or upon a majority vote of all of the members elected to the Senate.
Hours in session
N.Y. Senate Rules § R6S2, under Proceedings.
N.Y. Senate Rules § R6S2