Where to find the time adjustment on your clock

The location of the time-setting controls depends on what kind of clock you have. On a wall clock with hands, you'll usually find a small knob or dial on the back or side of the clock face — often labeled with arrows pointing left and right, or marked "set" or "time". On a digital clock (bedside, kitchen, or wall-mounted), the controls are typically buttons on the front or back of the unit, sometimes labeled "mode," "set," or with arrow symbols. Some digital clocks have a single button you press repeatedly to cycle through hours and minutes; others have separate buttons for each.

Before you start, check whether your clock runs on batteries, plugs into an outlet, or uses both. This matters because some clocks lose their settings when the power goes out, while others have a backup battery to hold the time. If your clock has been unplugged or the batteries are dead, you'll need to set it regardless of the current time shown.

Key Takeaways

  • Wall clocks with hands usually have a knob on the back; turn it clockwise to move the hands forward or counterclockwise to move them backward.
  • Digital clocks require you to press a "set" or "mode" button first, then use arrow buttons or number buttons to change the hours and minutes.
  • Always check whether your clock is battery-powered or plugged in, because power loss can reset the time to a default.
  • If your clock has a 12-hour display, pay attention to whether you're setting AM or PM, since many digital clocks require you to toggle this separately.
  • Some modern clocks sync automatically with a radio signal or internet connection and cannot be manually adjusted.

Adjusting an analog wall clock with hands

Locate the knob or dial on the back or side of the clock. Gently turn it clockwise (to the right) to move the hour and minute hands forward, or counterclockwise (to the left) to move them backward. Turn slowly so you can see the hands move and stop at the correct time. If you overshoot, continue turning in the same direction — it's easier than trying to back up precisely.

Some analog clocks have a second hand as well. You don't need to set this separately; it will start ticking once the clock is running. If the second hand is stuck or not moving, the clock may need a new battery or the mechanism may be jammed — see the troubleshooting section below.

Once the time is correct, release the knob and let it return to its resting position. The clock should now keep time normally. If it stops or the hands move erratically, the battery may be low or the mechanism may need cleaning.

Setting a digital clock with buttons

Press and hold the button labeled "set," "mode," or "time" until the hour digits begin to flash or highlight on the display. This tells you the clock is in setting mode. Once the hour field is active, use the arrow buttons (or + and − buttons) to increase or decrease the hour. Press the button repeatedly until the correct hour appears.

After the hour is set, press the "set" or "mode" button again to move to the minutes field. The minute digits should now flash. Use the arrow or +/− buttons to set the minutes to the correct value. On some clocks, you may need to press "set" a third time to confirm the AM or PM setting if your clock uses a 12-hour format.

Once all fields show the correct time, press "set" or "mode" one final time to exit setting mode and lock in your changes. The display should stop flashing and return to normal. If the time reverts to an earlier setting after you finish, the clock may have lost power or the battery may be failing.

Clocks that sync automatically and cannot be changed manually

Some modern digital clocks, especially those labeled "atomic," "radio-controlled," or "smart," receive time updates automatically from a radio signal or internet connection. These clocks cannot be manually adjusted — if you press the set button, nothing happens, or the display shows a message like "auto" or "sync."

If your clock is set to the wrong time and it's one of these types, check whether it has an "auto" or "sync" mode that you can turn off temporarily. Consult the instruction manual or the manufacturer's website to find the exact steps. Once you turn off automatic syncing, you should be able to set the time manually using the method described above. After you've set the correct time, you can turn automatic syncing back on if you wish.

If your clock is receiving a signal from the wrong time zone, you may be able to change the time zone setting in the menu rather than the time itself. Look for options labeled "zone," "region," or "location" in the clock's settings.

What to do if the clock won't hold the time

If you set the time correctly but it resets to a default time (often 12:00 or 1:00) after you unplug the clock or the power goes out, the backup battery is dead or missing. Check the back or bottom of the clock for a small compartment that holds a coin-cell battery (usually a round silver disc labeled CR2032 or similar). Replace it with a fresh battery of the same type and size, available at any drugstore or hardware store for a few dollars.

If the clock is plugged in but still loses time when the power flickers, the backup battery may be installed but failing. Try replacing it anyway — it's inexpensive and often solves the problem. If the clock still won't hold the time after a new battery, the internal circuit may be damaged and the clock may not be worth repairing.

For battery-powered clocks that lose time even when the batteries are fresh, the batteries may be installed incorrectly (check that the + and − ends match the markings inside the compartment) or the clock mechanism may need cleaning. If cleaning doesn't help, the clock is likely at the end of its life.

Clocks with 12-hour and 24-hour formats

If your digital clock displays time in 12-hour format (with AM and PM), you must set both the hour and the AM/PM indicator correctly. A clock set to 3:00 PM is very different from 3:00 AM. When you're in setting mode, look for a separate button or menu option to toggle between AM and PM, or look for a small indicator on the display that shows which one is currently selected.

Some clocks allow you to switch between 12-hour and 24-hour display formats. In 24-hour format, 3:00 PM is shown as 15:00, and there is no AM/PM indicator. If your clock is in the wrong format, check the instruction manual for the menu option to change it. This is usually found under "settings," "display," or "format."

When to call a professional or replace the clock

If the clock hands are bent, broken, or moving erratically, or if the digital display is cracked or showing garbled numbers, the clock is damaged and should be replaced. These problems cannot be fixed by adjusting the time.

If the clock mechanism is making a loud ticking, grinding, or buzzing sound that wasn't there before, the internal gears or motor may be failing. This is also a sign to replace the clock rather than attempt a repair.

For expensive or antique clocks, a professional clock repair service may be worth the cost. For standard household clocks, replacement is usually more practical. A new battery-powered wall clock or digital clock costs between $15 and $50 and will work reliably for years.

Frequently Asked Questions

Do I need to unplug my clock before changing the time?

No. Most clocks can be set while plugged in or powered on. Unplugging the clock may actually cause it to lose its time setting if the backup battery is dead. Leave the clock plugged in or powered on while you adjust the time.

What if I can't find the set button on my digital clock?

Check the back, bottom, and sides of the clock for small buttons or a recessed button you may need to press with a pen or paperclip. Consult the instruction manual or search the manufacturer's website by model number. The manual will show exactly where the controls are and how to use them.

Can I change the time on a clock that's plugged into a smart home system?

Smart clocks connected to Wi-Fi or a voice assistant often sync automatically and cannot be manually adjusted through the clock itself. You may be able to change the time through the companion app on your phone or through the voice assistant's settings. Check the app or say "change the time" to your device to see what options are available.

Why does my clock show the wrong time even after I set it?

The most common cause is a dead or dying battery. Replace the backup battery if your clock has one, or replace the main batteries if it's battery-powered. If the clock is plugged in, try unplugging it for 30 seconds and plugging it back in to reset the circuit. If the time is still wrong after these steps, the clock may be receiving an automatic time signal you need to disable first.

Is it normal for a clock to lose a few minutes each month?

Yes. Most household clocks are not precision instruments and may drift by a few minutes per month, especially if they're battery-powered. If the drift is more than 15 minutes per month, the battery is likely failing or the mechanism needs cleaning. Replace the battery first and see if the drift improves.