SharePoint Document Issues

How to Change the SharePoint Site Time Zone for Microsoft 365 Groups

Steve K Sep 29, 2026 869 views

Question details

The user needs to update the default time zone setting for SharePoint sites and Microsoft 365 Groups to reflect their actual local time.

How to Change the SharePoint Site Time Zone for Microsoft 365 Groups

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Modifying the time zone configuration for newly created SharePoint sites, existing sites, and corresponding Microsoft 365 group mailboxes.
Observed behavior: SharePoint sites and Microsoft 365 Groups display incorrect times (such as the default Pacific Time) because they inherited an older time zone setting from the SharePoint admin center.

Before you start

Ensure you have Site Owner or SharePoint Administrator permissions to access and modify regional settings for the affected sites.

Solution 1Recommended

Change the Time Zone for an Existing SharePoint Site

Manually update the regional settings for an individual existing SharePoint site.

Changing the time zone setting directly on a specific site ensures that timestamps on documents, lists, and pages reflect your correct local time. This method applies only to the individual site you are modifying.

Access Site Settings

Click the Gear icon (Settings) in the top-right corner of your SharePoint site, click on 'Site information', and then select 'View all site settings'.

Open Regional Settings

Under the 'Site Administration' section, click on 'Regional settings'.

Select the New Time Zone

Click the 'Time Zone' drop-down menu, choose your correct local time zone (e.g., Eastern Time), and click 'OK' to save your changes.

Change the Time Zone for an Existing SharePoint Site

Microsoft 365 Group Mailboxes: Changing the SharePoint site time zone does not automatically update the Microsoft 365 group mailbox. Outlook calendar event times are based on the mailbox's separate regional settings.

Solution 2

Update the Default Time Zone for New SharePoint Sites

Configure the SharePoint admin center to ensure all future sites are created with the correct time zone.

Solution 3

Update Multiple Sites Using PnP PowerShell

Use a PowerShell script to bulk-update regional settings across multiple existing SharePoint sites.

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Frequently Asked Questions

Why are my Microsoft 365 Group Outlook meetings showing the wrong time?

Outlook meeting times rely on the regional settings of the Microsoft 365 Group mailbox, not the connected SharePoint site. You must verify and update the time zone in the group mailbox settings to fix calendar issues.

Will changing the tenant default time zone fix my existing SharePoint sites?

No, updating the default time zone in the SharePoint admin center only applies to newly created sites. Sites that were created prior to this change will retain their original time zone and must be updated individually or via PowerShell.

Do I need admin rights to change a SharePoint site's time zone?

Yes, you need to be a Site Owner or have SharePoint Administrator privileges to access the 'Site settings' and modify the 'Regional settings' for any specific site.

Document & File Issues