To reset a digital clock, locate the time, clock, setting or mode button on the device. Depress and hold the button until the numbers on the clock flash. Use the hour and minute buttons to advance to the correct time. Save changes by pressing the mode or setting button.
Digital clocks that run on electricity require resetting whenever the power goes out or the clock is moved to a new location. This can be a major inconvenience, especially on older models. When power is restored to the device, some clocks display 12:00:00 rather than the correct time, making it necessary to reset the device.
Many later model digital clocks feature backup battery power that reduces the hassle of resetting the clock after a power loss. This feature also ensures that power outages do not cause disruptions in scheduled alarms, causing owners to oversleep or miss appointments.
Recently, some manufacturers have incorporated features that allow digital clocks to automatically synchronize with the time system of an existing broadcast radio, satellite television or Internet connection, according to WorldTimeZones.com. Digital clocks equipped with this feature automatically reset twice a year when daylight saving time begins and ends. Some models require owners to select their time zone during the initial setup of the device.