Petitioner challenges a determination finding him guilty of violating the prison disciplinary rules prohibiting fighting, violent conduct, creating a disturbance and refusing a direct order. Initially, petitioner's claim that his hearing was not timely commenced is unpersuasive as he erroneously counted the day on which the misbehavior report was written as one of the seven days within which the hearing was required to be held ( see Matter of Vasquez v. Goord, 14 AD3d 903, 904; Matter of Bossett v. Portuondo, 3 AD3d 639, 641). Moreover, the record reveals that a one-day extension of time was validly authorized to allow petitioner's assistant more time and petitioner did not establish prejudice as a result of the delay ( see 7 NYCRR 251-5.1 [a]; Matter of Berry v. Portuondo, 6 AD3d 848, 849). Finally, the misbehavior report, the testimony of its author and the fight investigation report provide substantial evidence to support the determination of guilt ( see Matter of Hernandez v. Selsky, 9 AD3d 662, 663, appeal dismissed and lv denied 3 NY3d 698).
Adjudged that the determination is confirmed, without costs, and petition dismissed.