If you love running, cycling, or triathlons, the Garmin Forerunner 735XT is a powerful tool for tracking your workouts. But what happens when its time won’t sync correctly? Many users face this issue, finding their watch hours behind, ahead, or simply stuck on the wrong time zone. This is not just an inconvenience—it can affect your training logs, race timing, alarms, and even your daily routine.
For athletes, time accuracy is critical. When your Forerunner 735XT shows the wrong time, you might miss workouts, misjudge pace, or lose trust in the device’s reliability. Surprisingly, time sync problems are more common than you think, and they often have simple solutions.
However, sometimes the cause is not obvious, and you may need to try several steps before your watch displays the correct time.
This guide is for anyone struggling with Garmin Forerunner 735XT time not syncing. Whether you’re new to Garmin devices or have used them for years, you’ll find answers here. We will explore why this happens, how to fix it, and how to prevent it in the future. You’ll also learn about settings, software, and even hidden features that affect time accuracy.
Let’s dive into practical solutions so you can get back to focusing on your training, not your watch.
Why Your Garmin Forerunner 735xt Time Is Not Syncing
When your Forerunner 735XT time won’t sync, it can be frustrating and confusing. There are several key reasons for this issue:
1. Gps Not Used Recently
The Forerunner 735XT relies on GPS signal to set the correct time. If you haven’t started an outdoor activity with GPS lately, your watch might not update the time, especially after a long flight or travel to a new time zone.
2. Bluetooth Sync Issues
The device can also update the time by syncing with the Garmin Connect app on your phone. If Bluetooth is off or the app is not updated, your watch may not receive the correct time.
3. Outdated Firmware
Sometimes, a firmware bug causes time-sync issues. If your watch’s software is not up to date, this can prevent proper communication with GPS satellites or the app.
4. Incorrect Time Zone Settings
If your time zone is set manually and doesn’t match your location, your watch may show the wrong time, especially after traveling.
5. Battery Or Hardware Problems
Rarely, an aging battery or internal hardware issue can disrupt timekeeping.
6. Daylight Saving Time (dst) Changes
Automatic time changes during DST transitions may not always update correctly if your watch hasn’t synced recently.
Understanding these causes is the first step toward a solution. Next, let’s explore what you can do about it.
How The Garmin Forerunner 735xt Sets Time
It’s important to know how your watch decides what time to show. The Forerunner 735XT can update its time in three main ways:
- GPS Sync: When you start an outdoor activity, the watch connects to GPS satellites and sets the time based on your location.
- Bluetooth Sync: When you sync the watch with your phone using the Garmin Connect app, it can update time from your phone.
- Manual Setting: You can also set the time manually, but this is less reliable, especially if you travel or cross time zones.
Each method has its pros and cons. GPS is most accurate, but needs open sky and a few minutes. Bluetooth is fast but depends on phone settings. Manual is simple but can easily get out of sync.
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Immediate Solutions: Fixing Time Not Syncing
If you notice your Forerunner 735XT is showing the wrong time, try these steps first. Often, the problem is temporary and can be fixed quickly.
1. Sync With Gps Outdoors
- Go outside to an open area with a clear view of the sky.
- Press the Start button, choose an outdoor activity (like Run).
- Wait for the watch to connect to GPS (the green GPS icon will show).
- Wait a few more seconds after GPS connects—this helps ensure time is set.
- Exit the activity. The time should now be correct.
Tip: Even if you don’t plan to exercise, just starting and waiting for GPS sync can update the time.
2. Sync With Garmin Connect App
- Make sure Bluetooth is on for both your watch and phone.
- Open the Garmin Connect app.
- From the app, tap the device icon and choose “Sync Now.”
- Wait for the sync to finish. Check if the watch shows the correct time.
If you recently changed time zones or daylight saving switched, this method often works well.
3. Check Time Settings
- On the watch, go to Menu > Settings > System > Time.
- Make sure “Set Time” is on “Auto.”
- If it’s set to “Manual,” switch to “Auto.”
- You can also change the time manually if needed, but “Auto” is recommended for most users.
4. Restart The Watch
A simple restart can solve many temporary glitches:
- Hold the “Light” button until the watch turns off.
- Wait 10 seconds, then hold the “Light” button again to turn it back on.
This refreshes the system and can force a time update.
5. Update Firmware
Outdated software can cause many issues. To check for updates:
- Connect your watch to your computer using a USB cable.
- Open Garmin Express on your computer.
- Follow prompts to check for and install updates.
- After updating, sync with GPS or the app again.
Keeping firmware current helps avoid many known bugs.
6. Reset Bluetooth Connection
If syncing with the app doesn’t work, try removing and re-adding the watch:
- In the Garmin Connect app, remove (unpair) the device.
- On your watch, go to Menu > Settings > Bluetooth > Pair Mobile Device.
- Pair the watch again with your phone.
- Sync to check if the time updates.
7. Factory Reset (last Resort)
If all else fails, a factory reset can fix deep software problems:
- Menu > Settings > System > Restore Defaults.
- WARNING: This deletes all data and settings. Sync your workouts to Garmin Connect first.
After reset, pair the device and sync the time.
Advanced Troubleshooting: When Basic Steps Fail
Sometimes, time sync issues are not fixed by the basic steps above. Here are deeper checks and solutions.
Check Time Zone Settings In Garmin Connect
Your phone’s time zone can affect the watch. If your phone is set to a manual or wrong time zone:
- On your phone, check Settings > Date & Time > Set Automatically (iOS/Android).
- Make sure it’s set to automatic, not manual.
Re-sync your watch using the Garmin Connect app after changing these settings.
Review Dst (daylight Saving Time) Handling
If your region recently changed clocks for DST:
- Go to Menu > Settings > System > Time > DST.
- Set to “Automatic.” If it’s on “Manual,” it might not update with the rest of the world.
- Sync with GPS or the app to update.
Check For Interference
Tall buildings, heavy tree cover, or even bad weather can block GPS signals. If your watch struggles to connect to GPS:
- Move to an open area, away from buildings or trees.
- Try syncing at a different time of day, or after waiting for a firmware update.
Compare Time With Other Devices
It helps to check if the problem is unique to your watch. Here’s a quick comparison:
| Device | Time Source | Sync Method | Common Issues |
|---|---|---|---|
| Forerunner 735XT | GPS, Phone, Manual | Outdoor GPS, Bluetooth | Needs GPS, App Sync |
| Smartphone | Cell Network, Internet | Automatic | Rarely wrong |
| Other Garmin Models | GPS, Phone | Similar to 735XT | Similar issues |
If only your Forerunner 735XT has the wrong time, it’s likely a device-specific setting. If all devices show the wrong time, check your phone’s time settings.
Use Garmin Express For Direct Sync
In some cases, the mobile app may not push changes correctly. Garmin Express, the desktop sync tool, can help:
- Download and install Garmin Express from the official Garmin website.
- Connect your watch via USB.
- Add your device in Garmin Express.
- Sync data. This can force a time update.
This method is especially useful after major software updates or if you use multiple computers.
Battery And Hardware Issues
If your watch is old (3+ years) or has battery issues, it may struggle to keep time accurately. Signs include:
- Fast battery drain
- Random shutdowns
- Time resets after charging
If you see these, contact Garmin support for possible battery replacement or repair.
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Preventing Time Sync Problems In The Future
Once your watch is showing the correct time again, you’ll want to avoid future headaches. Here are some tips to keep things running smoothly.
1. Sync With Gps Weekly
Even if you mostly run indoors, try to start an outdoor activity with GPS once a week. This keeps the internal clock accurate.
2. Keep Firmware Updated
Check for updates every month, or set Garmin Express to notify you. New firmware often fixes bugs related to time and date.
3. Enable Auto Time And Dst
Always use “Auto” settings for time and daylight saving. Manual settings are only for special cases.
4. Check Bluetooth Connection
If you switch phones, always re-pair the watch. A broken connection stops automatic time syncing.
5. Travel Tips
After landing in a new time zone, start a GPS activity to update the time. Don’t rely only on phone sync, as GPS is more reliable for location changes.
6. Monitor Battery Health
A weak battery can cause many problems, not just time. If your watch is over 3 years old, consider a battery check.
Common Mistakes And Misconceptions
Many users make simple mistakes when trying to fix time sync problems. Let’s clear up some myths and errors.
Believing Manual Time Is More Reliable
Setting time manually may look quick, but you’ll need to adjust it often, especially if you travel. Use “Auto” for less hassle.
Ignoring Firmware Updates
Some users avoid updates out of fear they’ll “break” the watch. But outdated firmware is a common reason for sync failures.
Relying Only On Bluetooth
Bluetooth sync works, but if your phone’s time is wrong, or the app hasn’t synced, your watch won’t update. Always double-check phone settings.
Not Waiting For Gps Lock
Many people start an activity before the GPS icon turns green. Without a full GPS lock, the time may not set correctly.
Forgetting To Re-pair After Phone Change
If you buy a new phone, you must re-pair your Forerunner 735XT. Otherwise, sync will fail—even if Bluetooth is on.
Real User Experiences And Examples
Let’s look at two examples from real Forerunner 735XT users:
Case 1: Frequent Traveler
Maria often travels for marathons. After a flight, her watch showed the wrong time, even after syncing with her phone. The fix? She started an outdoor run with GPS in the new city. After a few minutes, the time corrected itself.
Case 2: Firmware Glitch
John noticed his watch was always 5 minutes behind. He hadn’t updated firmware in over a year. After connecting to Garmin Express and installing the latest software, his time synced perfectly with his phone and GPS.
These stories show that small steps, like GPS sync or updating software, can solve most problems.
Comparing Garmin Forerunner 735xt With Other Models
Is time syncing better or worse on the 735XT compared to other Garmin watches? Here’s a simple comparison:
| Model | Time Sync Methods | Common Issues | Fixes |
|---|---|---|---|
| Forerunner 735XT | GPS, Bluetooth, Manual | Bluetooth bugs, GPS needed | GPS sync, Firmware update |
| Forerunner 245 | GPS, Bluetooth, Wi-Fi | Faster sync, rare errors | App sync, Wi-Fi |
| Fenix 5 | GPS, Bluetooth, Wi-Fi, Manual | Fewest issues, robust | Wi-Fi sync |
The 735XT is reliable, but lacks Wi-Fi time sync found in newer models. This means you rely more on GPS and Bluetooth.
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When To Contact Garmin Support
Most time syncing problems can be fixed at home, but contact Garmin if:
- The watch won’t sync time after all troubleshooting steps.
- The device resets time randomly.
- You see battery swelling or hardware damage.
- The watch won’t connect to GPS at all.
Garmin support can help with repairs, battery replacement, or warranty claims. You can reach them through the official Garmin Support page.
Non-obvious Insights Most Users Miss
- Phone Time Settings Matter: If your phone is set to a manual time or wrong time zone, syncing with the app will set the wrong time on your watch. Always use “Set Automatically.”
- Partial GPS Lock Is Not Enough: The GPS icon may show “ready” before getting a full satellite fix. Wait 15–30 seconds after “ready” for the most accurate time update.
Understanding these subtle points can save you hours of frustration.
Frequently Asked Questions
Why Does My Garmin Forerunner 735xt Show The Wrong Time After A Flight?
This happens because the watch does not always update the time zone automatically unless you start an outdoor activity with GPS. After landing, start a GPS-enabled activity for a few minutes, then exit. The correct time should update.
Can I Set The Time Manually On My Forerunner 735xt?
Yes, but it’s not recommended. Go to Menu > Settings > System > Time > Set Time > Manual. Manual time does not update automatically, so if you travel or daylight saving changes, you’ll need to adjust it again.
Why Does My Watch Show The Correct Time During An Activity But Not On The Main Screen?
During GPS activities, the watch uses satellite time, which is accurate. If the main screen is wrong, it means the time did not update after your last GPS activity. End the activity and check if the main screen updates. If not, try syncing with the Garmin Connect app.
What Should I Do If Firmware Update Fails?
If the firmware update does not complete, reconnect the watch to your computer and try again using Garmin Express. If it still fails, restart both the watch and computer, then repeat. If issues continue, contact Garmin support.
How Often Should I Sync With Gps To Keep Time Accurate?
Sync with GPS at least once a week, even if you mostly use the watch indoors. This ensures the internal clock stays accurate, especially after daylight saving changes or travel.
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When your Garmin Forerunner 735XT time is not syncing, it can disrupt your training and daily schedule. By understanding the causes, following the right steps, and using the tips in this guide, you can quickly get back on track. Regular updates, GPS syncs, and double-checking phone settings prevent most issues. If you ever run into trouble that won’t go away, Garmin’s support team is ready to help. Your time is valuable—make sure your watch agrees!