Are you tired of your watch showing time in military format (24-hour format)? If you own a Casio F91W watch, you can easily switch it to 12-hour format with just a few simple steps. The Casio F91W is a popular digital watch known for its durability, affordability, and classic design. One of the features that some users may prefer to change is the time format from 24-hour to 12-hour. Whether you’re new to using the Casio F91W or just want to refresh your memory, this guide will provide you with clear and concise instructions on how to make this change.
To begin, press and hold the “Mode” button for a few seconds until the “ADT” setting appears on the display. This setting controls the time format. Use the “Forward” (+) button to scroll through the options until you see “12H.” Once you’ve selected “12H,” press the “Mode” button again to confirm your choice. The watch will now display time in the 12-hour format. Additionally, you can customize the time format further by choosing between a 12-hour or 24-hour clock with seconds. To do this, press and hold the “Mode” button until you see the “12/24H” setting. Use the “Forward” (+) button to toggle between the two options, and then press the “Mode” button to confirm your selection.
Changing the time format on your Casio F91W watch is a straightforward process that can be completed in just a few seconds. By following these simple instructions, you can easily switch the watch to 12-hour format, making it more convenient for you to read and understand the time. Whether you prefer the 12-hour or 24-hour format, your Casio F91W watch can be customized to meet your preferences with just a few button presses.
Using the DST Mode
DST mode is an abbreviation for Daylight Saving Time mode. This mode is used to display the time in accordance with Daylight Saving Time (DST), which is a practice of advancing clocks during warmer months so that evenings have more natural light.
To use the DST mode on the Casio F91w, follow these steps:
- Press and hold the “Mode” button for three seconds. This will enter the mode setting screen.
- Use the “Adjust” button to scroll through the modes until you reach the DST mode. The DST mode is represented by the acronym “DST”.
- Press the “Mode” button to enable or disable the DST mode. When the DST mode is enabled, the “DST” indicator will appear on the screen. When the DST mode is disabled, the “DST” indicator will disappear.
| DST Mode | Description |
|---|---|
| Enabled | The time is displayed in accordance with Daylight Saving Time (DST). |
| Disabled | The time is displayed in standard time. |
Understanding the Timekeeping Buttons
The Casio F91w features three timekeeping buttons labeled “A,” “B,” and “C.” Each button has specific functions when navigating the watch’s timekeeping mode:
- A (Mode): Switches between timekeeping, stopwatch, alarm, and countdown timer modes.
- B (Reset): Resets the stopwatch and countdown timer or clears the alarm setting.
- C (Light and Time Zone): Activates the backlight and toggles between time zones when in certain modes.
6. Toggling the Time Format
To toggle between the 12-hour and 24-hour time formats:
-
Hold down the A button until the time display starts flashing.
-
Press the C button repeatedly to cycle through the following time formats:
Time Format 12-hour format with AM/PM indicator 24-hour format without AM/PM indicator -
Release the A button when the desired time format is selected.
Note: The time format setting will persist even when the watch is switched off and on again.
Wristwatch Maintenance for Optimal Timekeeping
1. Clean the Watch Regularly
Use a soft cloth to wipe down the watch case and band. Avoid using harsh chemicals or detergents.
2. Change the Battery When Needed
Most wristwatches use button batteries that last for several years. If you notice the watch is losing time or not running, it may be time to replace the battery.
3. Lubricate the Movement if Necessary
If the watch is running slowly or feels stiff, it may need to be lubricated. Take the watch to a watchmaker for lubrication.
4. Avoid Dropping or Jarring the Watch
Mechanical watches are delicate and can be damaged if dropped or jarred. Avoid wearing the watch during strenuous activities.
5. Do Not Overwind the Watch
If the watch has a wind-up mechanism, do not wind it past the recommended number of turns. Overwinding can damage the movement.
6. Store the Watch in a Cool, Dry Place
When not in use, store the watch in a cool, dry place. Avoid exposing it to extreme temperatures or sunlight.
7. Wear the Watch on the Correct Wrist
Most watches are designed to be worn on the left wrist. Wearing the watch on the right wrist can increase the risk of damage to the crown.
8. Avoid Contact with Water
Most wristwatches are water-resistant to some extent, but it is best to avoid submerging them in water. If the watch does get wet, dry it off as soon as possible.
- Change To 12 Hour Format
**For Casio F91w:**
- Press the mode button until you reach the timekeeping mode.
- Press the up or down button to toggle between 12-hour and 24-hour format.
- Press the mode button to save your changes.
For Other Watches:
| Brand | Instructions |
|---|---|
| Timex | Press and hold the set button for 10 seconds. |
| Seiko | Press and hold the mode button for 5 seconds. |
| Citizen | Press the reset button three times in a row. |
9. Set the Time and Date
Press the correct buttons to set the time and date to the desired settings. Refer to the watch’s instruction manual for specific instructions.
How to Change Casio F91w to 12 Hour
The Casio F91w is a popular digital watch that features both 12-hour and 24-hour time formats. To change the time format to 12-hour, follow these steps:
- Press and hold the “Mode” button for about two seconds to enter the settings mode.
- Use the “Forward” button to scroll through the settings until the “Time Format” option appears.
- Press the “Select” button to toggle between the 12-hour and 24-hour formats.
- Once you have selected the desired time format, press the “Mode” button to exit the settings mode.
People Also Ask About Casio F91w How to Change to 12 Hour
How do I change the time format on my Casio F91w watch?
To change the time format on your Casio F91w watch, follow the steps outlined in the main section of this article.
How do I set the time on my Casio F91w watch?
To set the time on your Casio F91w watch, first enter the settings mode by pressing and holding the “Mode” button for about two seconds. Then, use the “Forward” and “Reverse” buttons to adjust the hour, minutes, and seconds. Once you have set the desired time, press the “Mode” button to exit the settings mode.
What is the difference between 12-hour and 24-hour time formats?
12-hour time format uses the “AM” and “PM” designations to indicate whether the time is before or after noon. 24-hour time format, also known as “military time,” uses a single number to represent the hour, with the hours ranging from 00:00 to 23:59.