Based on regional calendar data including weekday information and holiday information, days of a month to be set are displayed as date buttons in a nonconsultation day setting image. A WORK button, an ALL button, a PM button or an AM button may be clicked to set consultation days and nonconsultation days for each day or weekday. The amount of energy consumed by an image forming apparatus is reduced by an energy saving mode in a preset nonbusiness time zone on nonbusiness days, and on Sundays and holidays which are not working days.