Wrong Time Zone Autonomically changes

Question

Wrong Time Zone Autonomically changes

Vervaeke, Christian 0

I have a user whose time zone keeps reverting to CST even though he's physically in EST. He travels for work and was recently in Mexico, returning this week — the issue started shortly after he got back.

I've already confirmed:

Time zone is set to update automatically (On)
Location services are enabled (On)
He is not connected to VPN

After a recent Windows Update and restart, the time zone corrected itself to EST and held for the rest of the day, but then reverted back to CST on its own.

Is there anything else I can troubleshoot on my end to resolve this? Ideally I'm looking for a fix that addresses the root cause rather than disabling automatic time zone detection — since he travels internationally for work, I'd like the auto-detection to keep working correctly rather than have him manually switch the time zone every time he changes locations.

Thanks for the help.

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2 answers

Your answer

Answer 1

This sounds like Windows’ automatic time-zone detection is receiving an incorrect location signal rather than a Windows Time/NTP synchronization issue.

Since Location Services and Set time zone automatically are already enabled, I’d check these next:

Go to Settings -> Privacy & security -> Location and confirm that Windows Location Service is enabled.
Check whether the device is managed by Group Policy or Intune, because a policy can override the automatic time-zone setting.
Check the Auto Time Zone Updater (tzautoupdate) service/registry configuration. Microsoft documents that tzautoupdate controls the automatic time-zone feature.
Check Settings -> Windows Update -> Update history and note the exact update installed immediately before the behavior started.
If the user travels frequently and automatic detection continues selecting the wrong zone, temporarily disable Set time zone automatically and select the correct zone manually. Microsoft documents this as the supported manual configuration.

Because the issue started after returning from Mexico, I'd also verify whether Windows is receiving an incorrect location result rather than assuming the Windows Time service is the cause.

If this is a managed/work device, I would check the relevant Group Policy/Intune settings before changing the registry.

Answer 2

Hello Christian,

Since the time zone corrects itself after Windows Update but later reverts to CST, I would investigate Windows Location Provider and any management policies that may be changing the setting. First, verify that the Auto Time Zone Updater service (tzautoupdate) is running and not disabled. You can check it with Get-Service tzautoupdate in PowerShell. Confirm that Windows Location Services is enabled and that the Windows Location Provider policy is not disabled under Computer Configuration → Administrative Templates → Windows Components → Location and Sensors. If the device is managed by Intune or domain policy, check whether any configuration profile or script is enforcing CST. Since the issue started after international travel, test whether Windows is receiving stale or incorrect location information by connecting to a different network, such as a mobile hotspot. Also, check Event Viewer around the time the time zone changes to identify any related location or policy events. Please confirm the Windows version, whether the device is Entra ID/domain joined or Intune-managed, and whether the change happens during active use, sleep, or restart. I would avoid disabling automatic detection or using w32tm /resync, as time synchronization does not resolve an incorrect time zone selection.

I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!

HP.