How to Change the Time on a G-Shock Watch

G-Shock watches are built tough — but their button-based interfaces can feel anything but intuitive the first time you try to adjust the time. Whether you've just crossed a time zone or your watch drifted slightly, setting the time correctly depends on which G-Shock module you own, and the process varies more than most people expect.

Why G-Shock Time-Setting Isn't One-Size-Fits-All

Casio produces dozens of G-Shock models across multiple movement types. The steps that work on one watch may do nothing — or trigger the wrong function — on another. Before pressing any buttons, the single most important thing you can do is identify your module number.

You'll find a small engraved number on the caseback of your watch, typically a 4-digit code (e.g., 3229, 5610, 5600). This number corresponds to a specific Casio manual, which Casio makes freely available at support.casio.com. That module number is your roadmap.

The General Button Layout You Need to Know

Most G-Shock watches share a standard 5-button layout:

• Light button — top left
• Mode button — bottom left
• Adjust/Set button — top right
• Forward button — bottom right
• Reverse button — middle right (on many models)

These buttons behave differently depending on the current mode, so understanding what mode you're in matters as much as which button you press.

How to Change the Time on Most Standard G-Shock Models ⌚

For the majority of analog-digital and digital G-Shock models, the process follows this general sequence:

1. Hold the Adjust button (top right) for 2–3 seconds until the display begins flashing. This puts the watch into setting mode.
2. Press Mode to cycle through the setting fields — typically in this order: seconds, hour, minute, year, month, day.
3. Use the Forward and Reverse buttons to increment or decrement the currently flashing value.
4. Press Mode again to advance to the next field.
5. Once all values are set, hold the Adjust button again (or press Light, depending on the model) to confirm and exit setting mode.

On some models, you first need to press Mode repeatedly to reach the Timekeeping display before holding Adjust. If holding Adjust in the default display does nothing visible, cycling through modes first is usually the fix.

Atomic and Solar Models Behave Differently

G-Shock watches with radio-controlled (atomic) timekeeping — often labeled "Multiband 6" or "Atomic" — are designed to sync automatically with time signal transmitters. In most regions, these watches self-correct daily.

On these models:

• Manual time adjustment is intentionally limited or disabled for the time display, because the watch expects to receive a signal.
• You can typically trigger a manual reception attempt by holding a specific button in Timekeeping mode — often the Adjust button held for longer.
• The watch will search for a signal and update on its own if one is detected.

If you're in a region outside the signal coverage (parts of Asia, Europe, and North America are covered; other areas are not), the watch may fall back to its internal oscillator, and manual setting may become available or necessary depending on the module.

Analog-Digital (ANA-DIGI) Models Add a Step 🔧

G-Shock models with physical analog hands alongside a digital display require you to set both the digital time and manually align the analog hands. These are separate processes.

• The digital portion is set using the standard button sequence above.
• The analog hands are then adjusted separately — usually by using the Forward/Reverse buttons while the hand-alignment option is selected in the setting menu.
• If the hands fall out of sync (pointing to the wrong position even when the digital display is correct), most ANA-DIGI models include a hand alignment correction function specifically for this.

Getting both components aligned is where many users get stuck, and it's the area where consulting the exact module manual pays off the most.

Bluetooth-Connected G-Shock Models

Newer G-Shock models with Bluetooth connectivity — typically those compatible with the Casio Watches app — can sync their time automatically to your smartphone's clock.

On these models:

• Pairing the watch to the app and enabling auto-sync keeps the time accurate without manual adjustment.
• Time zone changes during travel can be handled within the app.
• Manual adjustment through buttons is still possible but less commonly needed.

The app is available for both Android and iOS, though supported model lists vary and older Bluetooth-enabled models may require a legacy version of the app.

Common Variables That Change the Process

The Detail That Catches Most People

One frequently overlooked setting: AM/PM when using 12-hour mode. If your watch shows 12-hour time and you set the hour correctly but don't check whether it's AM or PM, the watch may be 12 hours off and appear correct at a glance. Switching to 24-hour display mode temporarily during time-setting eliminates this ambiguity entirely.

Similarly, seconds on most G-Shock models can be reset to :00 by pressing the Adjust button briefly while the seconds field is flashing — useful for syncing precisely to a time signal.

How smoothly any of this goes in practice comes down to which specific model you have, whether it includes atomic or Bluetooth features, and how its particular module sequences the setting fields. The same physical button can serve three different functions depending on the display mode and setting state — which is why two G-Shock owners following "the same steps" can have completely different experiences.