![]() ![]() To prevent this, make sure that the RealTimeIsUniversal registry key is enabled before rebooting your instance. This might cause issues logging in to the instance. Skewing the time breaks authentication due to Kerberos restrictions. If your instance is domain joined to an AWS Managed Microsoft AD directory, change the time settings on your instance to use the domain controller as the time source to avoid a time skew. If you're running Windows Server 2008 or later, add a RealTimeIsUniversal registry key to make the new time persist after reboot. The time change doesn't persist after system reboots Note: Because the Citrix Xen Guest Agent service might cause issues with time synchronization, it's a best practice to update Citrix PV drivers to Amazon PV drivers. For more information, see Configure network time protocol (NTP). The new time and date settings take effect immediately.Īlternatively, you can use external network time protocol (NTP) sources. For example, 08:35:00 AM.Įnter a new date in mm-dd-yyyy format. Enter the new time or date at the prompt.Įnter a new time in HH:MM:SS AM/PM format.Enter time or date in the Command Prompt window, then select OK.Run a Command Prompt window as Administrator.Highlight Prohibit access to Control Panel and PC settings, and then select Edit policy setting.Ĭhange the time zone using Command PromptĪfter verifying the policy setting, you can change the time zone from the Command Prompt window.Ĭhange the time and date settings using Command Prompt.Select User Configuration, Administrative Templates, Control Panel. ![]() If you can't change the time zone and time/date, use the Command Prompt window to configure Amazon Time Sync Service on your instance.īefore you begin, use the following steps to verify that the Prohibit access to Control Panel and PC settings policy is disabled in the Local Group Policy Editor: Resolution Unable to change the time using Systems Settings or the Control PanelĪmazon provides the Amazon Time Sync Service, which is accessible from all EC2 instances. You can use a different time zone to suit your requirements, if needed. Using UTC on your instances also facilitates synchronization across your AWS CloudWatch logs, metrics, local logs, and other services. It's a best practice to use Coordinated Universal Time (UTC) for your instances to avoid human error. The Amazon Time Sync Service is behind other atomic clocks by X minutes.The time change doesn't persist after system reboots.The You do not have permission to perform this task error displays when trying to change time settings using the Control Panel. The Set Time Zone Automatically option is greyed out. Unable to change the time using Systems Settings or the Control Panel due to the following reasons:.The following are common time-related issues that occur on Windows instances:
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