The basic steps for most Casio watches
Most Casio watches adjust the time through a button sequence rather than a crown you turn. Press and hold the button labeled Mode or Adjust (usually on the left side of the watch) until the display starts flashing. Once the time display is flashing, use the arrow buttons to move between hours, minutes, and seconds. Press the button again to confirm each change and move to the next field.
The exact button names and their locations vary by model — a digital sports watch uses different buttons than a G-Shock or an analog-digital hybrid. Your watch manual will show you which button does what. If you no longer have the manual, you can find it free on Casio's website by searching for your model number, which appears on the back of the watch.
The process usually takes under a minute once you know which buttons to press. Most people get stuck because they hold a button too long or press it in the wrong order, not because the watch itself is broken.
Key Takeaways
- Press and hold the Mode or Adjust button until the time display flashes, then use arrow buttons to change hours, minutes, and seconds.
- Each Casio model has a different button layout, so check your manual or Casio's website for your specific watch model.
- If the time won't change, make sure you are holding the button long enough to enter adjustment mode — a short press will not work.
- After you set the time, press Mode again to exit adjustment mode and save your changes.
Finding your watch model number and manual
Your Casio model number is printed on the back of the watch case, usually near the bottom. It starts with letters (like F-91W, AE-1200, or DW-5600) followed by numbers. Write this down or take a photo.
Go to Casio's official website and use their search bar to find your model. The manual will be in PDF format and will show you exactly which buttons to press and in what order. Casio keeps manuals for discontinued models online, so even older watches usually have documentation available.
Entering time adjustment mode on digital watches
On most digital Casio watches, the Mode button is on the left side of the case. Hold it down for two to three seconds — not a quick tap. You should see the display change or start flashing. If nothing happens, try holding it longer, up to five seconds.
Once you are in adjustment mode, the hours field will usually flash first. Use the up or down arrow button (often labeled with + and − symbols) to change the hour. Press Mode again to move to minutes, then press Mode once more to move to seconds. After you set seconds, press Mode one final time to exit and save.
If you make a mistake, you can usually press a button labeled Reset or hold Mode again to start over. The exact recovery method depends on your model, so check the manual if you get stuck.
Adjusting time on G-Shock and sports models
G-Shock watches often use a button labeled Adjust instead of Mode, and it is usually positioned on the lower left. The sequence is the same — hold it until the display flashes — but the button may require a firmer press than on other Casio models.
Some G-Shock models have a separate button for moving forward and backward through time fields. Check your manual to see whether you use one button to cycle through fields and a different button to change the values, or whether the same button does both.
G-Shock watches are designed to survive drops and water exposure, so the buttons are often stiffer than on regular digital watches. If you feel resistance, that is normal — keep pressing firmly.
Analog-digital Casio watches
Casio makes hybrid watches with both hands and a digital display. On these models, you usually adjust only the digital time, not the hands. The process is the same as a full digital watch — find the Mode button, hold it until the display flashes, and use arrow buttons to change hours and minutes.
The hands on the watch face may not move when you adjust the digital time. This is normal. The hands show a separate time zone or function, or they are set independently through a different button sequence. Check your manual to see whether the hands need to be adjusted separately.
What to do if the time will not change
If you press the buttons and nothing happens, the watch may be in a locked mode. Some Casio models have a Hold or Lock function that prevents accidental button presses. Look for a button labeled Hold or Lock and press it to unlock the watch, then try the time adjustment sequence again.
If the display is completely dark or unresponsive, the battery may be dead. Casio watch batteries usually last two to three years. You can replace the battery yourself if you are comfortable opening the watch case, or take it to a watch repair shop or jewelry store. Battery replacement usually costs between five and fifteen dollars.
If the buttons feel stuck or broken, do not force them. A stuck button may be jammed with dust or debris. Try gently pressing it several times in different directions. If it still will not move, the watch may need professional repair.
Frequently Asked Questions
How do I know if I am in time adjustment mode?
The time display will flash or blink on the screen. If the display is steady and not flashing, you are not in adjustment mode yet. Hold the Mode button longer — usually two to five seconds — until you see the flashing start.
Can I adjust just the minutes without changing the hours?
Yes. Once you are in adjustment mode and the hours field is flashing, press Mode to move to the minutes field. The hours will stop flashing and the minutes will start flashing. Now you can change only the minutes without touching the hours.
What happens if I hold the Mode button too long?
On most Casio watches, holding Mode too long will cycle you through different adjustment fields or exit adjustment mode entirely. You can always press Mode again to re-enter adjustment mode and start over. Nothing will break.
Do I need to adjust the seconds?
No. Most people leave seconds at 00. If you want to sync the seconds to an exact time, press Mode to reach the seconds field and use the arrow buttons to set it. If you skip this step, the seconds will usually stay at whatever they were before.
Where do I find the manual if my watch model is very old?
Search Casio's website for your model number first. If it is not there, try searching the model number plus "manual" in a search engine — many watch enthusiast sites host archived Casio manuals. You can also contact Casio customer service with your model number and they can send you a PDF.