The fastest way depends on what kind of clock you have

Most clocks fall into one of three categories: analog (with hands), digital (with numbers on a display), and smart clocks (connected to Wi-Fi or your phone). Analog clocks are the slowest to adjust because you turn the hands by hand. Digital clocks usually have buttons on the back or side. Smart clocks often sync automatically, but you can override them through an app or settings menu. The method takes anywhere from 30 seconds to five minutes depending on your clock type.

Before you start, find out whether your clock runs on batteries, plugs into power, or both. This matters because some clocks reset to a default time if you remove the battery while changing it. Check the back or bottom of the clock for a label or manual—most manufacturers print basic instructions there.

Key Takeaways

  • Analog clocks require you to turn the hour hand and minute hand manually, and you must be careful not to damage the mechanism inside.
  • Digital clocks have a mode button or settings button that cycles through hours and minutes; hold it down to move faster through the numbers.
  • Smart clocks connected to your phone or Wi-Fi often change automatically, but you can manually override the time in the settings app.
  • Battery-powered clocks may reset to 12:00 if you remove the battery, so check your manual before opening the battery compartment.
  • If your clock has no visible buttons, look for a small hole on the back—this usually hides a reset or mode button you press with a pen.

Changing an analog clock with hands

Locate the small knob or stem sticking out from the center of the clock face, usually at the 3 o'clock position. This is the time-setting mechanism. Gently pull the knob straight toward you—do not twist it yet. You should hear or feel a small click, which means the clock mechanism has disengaged and the hands are now free to move.

Once the knob is pulled out, turn it clockwise (the same direction clock hands move) to advance the time. Turn slowly and watch the minute hand move around the dial. When the minute hand reaches the correct minute, stop turning. Then adjust the hour hand by continuing to turn the knob until the hour hand points to the correct hour. The hour hand will move automatically as you adjust the minutes, so fine-tune the minutes last.

Push the knob straight back in until you hear or feel it click again. This re-engages the clock mechanism and the hands will resume normal movement. Do not force the knob—if it does not slide smoothly, you may be turning it instead of pulling it. Release and try again with a straight pull.

Changing a digital clock with buttons

Look for a button labeled "Mode," "Set," "Time," or "Adjust" on the back, side, or bottom of the clock. Press this button once. The display should show a flashing number—usually the hour—which means the clock is now in time-setting mode. If nothing flashes, try holding the button down for two seconds instead of pressing it once.

Once a number is flashing, use the "+" or "−" buttons (or "Up" and "Down") to change that number to the correct value. Press and release the button once for each increment, or hold it down to move through the numbers faster. When the hour is correct, press the Mode button again. The next number (usually the minutes) will begin flashing. Repeat the process with the + or − buttons until the minutes are correct.

Press Mode one more time to exit time-setting mode. The display should stop flashing and return to normal. If your clock has a seconds display and it is still flashing, press Mode again. Some clocks also require you to set AM or PM—if you see "AM" or "PM" flashing after the minutes are set, use the + or − buttons to toggle between them, then press Mode to confirm.

Changing a smart clock or connected device

Smart clocks that connect to Wi-Fi or your phone usually set the time automatically based on your location. If the time is wrong, the fastest fix is often to check your phone's time first—if your phone is correct and the clock is wrong, the clock may have lost its connection. Restart the clock by unplugging it for 10 seconds, then plugging it back in. It should reconnect and sync within a minute.

If restarting does not work, open the clock's companion app on your phone (such as Google Home, Amazon Alexa, or the manufacturer's app). Look for a "Settings" or "Device Settings" option. Tap it and find the "Time" or "Time Zone" section. You should see a toggle for "Set time automatically" or similar. If it is turned on, turn it off temporarily. You will then see fields where you can manually enter the hour and minute. Enter the correct time and save your changes.

Turn the automatic time setting back on once the time is correct. The clock will now sync with your phone's time going forward. If your clock does not have an app, look for a physical button on the device itself—some smart clocks have a small reset hole on the back that you press with a pen to enter manual time mode, which then works like a digital clock with buttons.

Changing a clock with a hidden reset button

Some clocks, especially small travel clocks or alarm clocks, have no visible buttons on the front or sides. Look at the back and bottom of the clock carefully. You may see a tiny hole, often labeled "Reset" or "Set." This hole hides a small button that you access with a ballpoint pen or straightened paperclip.

Insert the pen tip gently into the hole and press the button inside. Hold it for one to three seconds. The display should change or the clock should beep, which means you have entered time-setting mode. Release the button and look for a flashing number on the display. Use the same method as a digital clock: press the button again to move to the next field (hour, then minutes), and use any visible + or − buttons to adjust the numbers. If there are no + or − buttons visible, try pressing the reset button repeatedly—some clocks cycle through the numbers each time you press it.

Common mistakes that can damage your clock

The most common mistake with analog clocks is forcing the hands. If you turn the stem and the hands do not move, do not push harder. You may have twisted the stem instead of pulling it, or the mechanism inside may be stuck. Release the stem, wait a few seconds, and try again with a straight pull. Forcing a stuck mechanism can break the gears inside, and repair is often more expensive than replacing the clock.

With digital clocks, avoid pressing multiple buttons at once or mashing a button repeatedly in frustration. This can cause the clock to skip numbers or enter an unexpected mode. Press buttons one at a time and wait a moment between presses. If you get stuck in a mode you did not intend, look for a "Reset" or "Clear" button, or unplug the clock for 10 seconds to return it to its default state.

Never remove the battery from a battery-powered clock while you are in the middle of changing the time. Some clocks will reset to 12:00 or lose all settings if power is interrupted. If your clock has both battery and plug-in power, keep it plugged in while you change the time, or change the time when ready after inserting fresh batteries before you do anything else.

What to do if your clock will not change

If the time will not change no matter what you try, the clock may be in a locked mode. Some clocks have a "Lock" button that prevents accidental changes—look for a button labeled "Lock," "Hold," or a padlock symbol. Press it to unlock the clock, then try changing the time again. Check your clock's manual or the manufacturer's website for the model number if you cannot find the lock button.

If the clock is digital and the display is completely dark or blank, the battery may be dead. Replace the battery with a fresh one of the same type and size (usually AA, AAA, or a coin cell). Wait 10 seconds for the clock to power up, then try changing the time. If the display still does not light up, the clock may have a hardware failure and may need to be replaced.

For smart clocks that will not sync or change time, try a factory reset. This erases all settings and returns the clock to its original state. Look for a reset button (usually a small hole on the back) and hold it for 10 to 15 seconds until the clock beeps or the display changes. You will then need to set up the clock again from scratch using the app or manual instructions.

Frequently Asked Questions

Can I change the time on a clock while it is plugged in?

Yes, it is safe to change the time on a plugged-in clock. In fact, it is often safer because the clock will not lose power in the middle of the adjustment. The only exception is if your manual specifically warns against it—some older clocks have capacitors that can discharge unexpectedly. When in doubt, unplug the clock, change the time, and plug it back in.

Why does my analog clock keep stopping when I try to change it?

You may be turning the stem instead of pulling it. The stem must be pulled straight out before you can turn it to change the time. If you turn it without pulling, the mechanism will not disengage and the hands will not move freely. Try again with a firm, straight pull, then turn gently. If the hands still will not move, the mechanism may be jammed and the clock may need professional repair.

What happens if I change the time during daylight saving time?

If your clock is smart and synced to your phone or Wi-Fi, it will handle daylight saving time automatically—you do not need to do anything. If your clock is manual (analog or digital with buttons), you must change it yourself on the day daylight saving time begins or ends. Set it forward one hour in spring and back one hour in fall. Mark your calendar or set a phone reminder so you do not forget.

Do I need to change the date on my clock too?

Only if your clock displays the date. Most basic clocks show only the time and do not have a date display. If your clock does show the date and it is wrong, look for a separate "Date" button or mode in the settings. Follow the same process as changing the time: press the mode button until the date field flashes, then use + or − to adjust it. Smart clocks usually update the date automatically.

Can I change the time on a clock that is currently alarming?

Yes, but it is easier to stop the alarm first. Press the button labeled "Alarm," "Snooze," or "Off" to silence the alarm, then change the time. If you try to change the time while the alarm is sounding, you may accidentally change the alarm time instead of the current time. Once the alarm is off, proceed with changing the time using the method for your clock type.