Ohio Revised Code General Provisions § 5.40

Any financial institution doing business in this state may outside of regular banking hours on any day, or at any time on a day which is in whole or in part a holiday, pay, certify, or accept negotiable or nonnegotiable instruments including a demand instrument dated on the holiday on which it is presented for payment, certification, or acceptance, and transact any other business which would be valid if done on a business day during regular banking hours.  This section does not affect any law relative to the time of maturity or presentment of negotiable instruments or the validity of any law relative to transactions by persons or corporations.

This section does not require a financial institution which remains open for business on all or a part of any holiday to perform any act on that day in its capacity as collection agent which would not be required of it if it were closed on such holiday or part holiday.