How do you change the time and date on Canon P23-DH V adding machine?

To change the time and date on the Canon P23-DH V adding machine, first, turn the machine on. Then, press the "Date" key, followed by entering the correct date in the format MM/DD/YY. After setting the date, press the "Time" key and enter the current time in the format HH:MM. Finally, press the "AM/PM" key as needed to complete the adjustment.