The basic steps for most Casio watches
Most Casio watches use the same method to change the time: pull the crown (the small knob on the side) out one or two clicks, then rotate it to move the hands. The number of clicks matters — pull once for date and day adjustments, pull twice for time. Push the crown back in when you're done.
The crown is usually located at the 3 o'clock position on the watch face. On some models, especially digital watches, there is no crown at all — instead you'll use buttons on the side of the case to navigate a menu and change the time that way. Check your specific model's manual first, because the exact steps vary.
If your watch has a screw-down crown (you'll see a small slot or notch), unscrew it counterclockwise before you pull it out. This protects the watch from water damage when the crown is pushed back in. Screw it back down when you're finished adjusting the time.
Key Takeaways
- Pull the crown out one click to adjust the date and day, two clicks to adjust the hour and minute hands.
- Rotate the crown clockwise or counterclockwise depending on which direction moves the hands or numbers where you need them.
- If your crown has a slot, unscrew it first by turning counterclockwise, then pull it out to make your adjustments.
- Push or screw the crown back in firmly when you're done — a loose crown lets water and dust into the watch.
Analog watches with a crown
On an analog Casio (one with hands, not a digital display), pulling the crown out twice stops the second hand and lets you adjust the hour and minute hands. Rotate the crown slowly — it's straightforward to overshoot by a few minutes. Once the time is correct, push the crown back in. The second hand will resume moving.
If you need to set the date or day of the week, pull the crown out only once. Rotating it will cycle through the dates and days without moving the hour and minute hands. This is useful if you've worn the watch for a few days without adjusting it, or if you're traveling across time zones and want to keep the date correct.
Some analog Casios have a crown you can pull out three times for additional functions like a 24-hour hand or a second time zone. Your manual will show which pull position controls which feature. If you don't have the manual, Casio's website has PDFs for most models — search "Casio [your model number] manual" to find it.
Digital watches with buttons
Digital Casios usually have four buttons: one at the top left, one at the top right, one at the bottom left, and one at the bottom right. To change the time, press the top left button (often labeled "Mode") repeatedly until you see "Time" or a clock symbol on the display. Then use the other buttons to navigate to the hour and minute fields and change them.
The exact button sequence depends on your model. Usually the top right button moves forward through the options, the bottom right button increases the number in the selected field, and the bottom left button decreases it. Press the top left button again to save and exit. If the buttons don't respond the way you expect, the manual for your specific model will show the correct sequence.
Some digital Casios have a "Set" or "Adjust" button instead of using the Mode button to enter time-setting mode. Look for a button with text printed directly on it rather than above or below it — that's usually the one that enters adjustment mode. Once you're in the time menu, the other buttons work the same way.
What to do if the time won't change
If you've pulled the crown out and rotated it but nothing happens, the crown may not be pulled out far enough. Try pulling it out a bit more — there's usually a distinct click or resistance when it reaches the correct position. If it still doesn't work, the crown may be stuck or the watch may need a battery replacement.
For digital watches, if the buttons don't enter time-setting mode, the battery may be low or dead. Casio digital watches often show a low battery indicator (usually a small symbol on the display), but not always. If the display is dim or flickering, try replacing the battery first. Most Casio watch batteries cost between $5 and $15 and can be replaced at a jewelry store or watch repair shop.
If the crown is physically stuck and won't pull out, do not force it — you may break the internal mechanism. A watch repair shop can usually free a stuck crown without damage. This is worth doing if the watch is otherwise working well, because a new crown and the labor to install it typically costs less than replacing the watch.
Protecting your watch while adjusting it
Water resistance on a Casio watch only works when the crown is fully pushed in or screwed down. Every time you adjust the time, you're opening a small gap that lets moisture in. If you adjust the time frequently or in humid environments, the inside of the watch can develop condensation or corrosion over time.
To minimize risk, adjust the time indoors in a dry room rather than outside or in a bathroom. Push the crown in firmly until you feel it seat completely — a loose crown is the most common cause of water damage in watches that are supposed to be water-resistant. If your crown has a screw-down design, turn it clockwise until it's snug but not so tight that you strip the threads.
If you notice condensation inside the watch face after adjusting the time, or if the watch stops working shortly after an adjustment, water may have entered the case. A watch repair shop can open the case, dry the inside, and replace the gasket that seals the crown. This is usually cheaper than replacing the watch and prevents further damage.
Finding your watch model number and manual
Your Casio model number is usually printed on the back of the watch case or on the band. It's a short code like "A158" or "F-91W" — not the serial number, which is longer and unique to your individual watch. Once you have the model number, go to Casio's official website, click "Support" or "Manuals," and search for your model.
Casio's manuals are free PDFs that show the exact button or crown positions for your specific watch. They also include diagrams of what each button does and what the display shows in different modes. If Casio's site doesn't have your model (usually because it's very old), try searching "[model number] manual PDF" in a search engine — watch enthusiast sites often host scanned copies.
If you can't find the model number or manual, a photo of your watch posted in a watch forum or subreddit like r/Watches will usually get you an identification within hours. Once you know the model, the manual is almost always available online. Having the manual on your phone makes it straightforward to reference the correct button sequence whenever you need to adjust the time.
Frequently Asked Questions
How do I know if I'm pulling the crown out far enough?
You should feel a distinct click or resistance when the crown reaches the correct position. If you're not sure, pull it out a little more — there are usually two or three distinct stops as you pull. The manual for your model will show how many clicks are needed for time adjustment, but most watches require two clicks.
Can I adjust the time while wearing the watch?
Yes, you can adjust the time while wearing the watch on your wrist, though it's easier to remove it first. If you leave it on, be careful not to pull the crown out so far that it catches on your sleeve or skin. For watches with screw-down crowns, it's much easier to unscrew and adjust if you take the watch off.
What if my watch has a crown but no manual?
Try pulling the crown out one click and rotating it to see if the date or day changes. If nothing happens, push it back in and try pulling it out two clicks instead. Most Casio watches follow this pattern, so one of these will work. If neither does, search your model number online — the manual is almost certainly available as a free PDF.
Does adjusting the time affect the water resistance?
Only while the crown is pulled out. Once you push it back in firmly, the watch returns to its normal water resistance rating. However, every time you open the crown, you risk letting a tiny amount of moisture in if the gasket is worn. If you adjust the time very frequently, the gasket may eventually need replacement.
Why does my digital watch time keep resetting?
The battery is almost certainly dead or dying. Digital Casios store the time in memory powered by the battery, so when the battery fails, the time resets to a default (usually 12:00). Replace the battery and set the time again. If it resets again within a few days, the new battery may be defective — try a different one.