How to Change Date and Regional Settings in Excel for the Web
Question details
The user needs to change the regional date format in Excel for the Web so that dates entered in a specific format (such as German) are accepted by data validation rules.

- Product
- Excel for the Web
- Device & OS
- not provided
- Scenario
- Entering dates in non-US formats into an Excel spreadsheet online and encountering data validation errors.
- Observed behavior
- Excel for the Web rejects non-US date entries because the regional settings default to US-style dates.
Ensure you are logged into your Microsoft 365 account and have the Excel workbook open in your web browser. Note that changes to personal settings apply only to your view, while organization-wide changes require administrator access.
Change Personal Regional Format Settings in Excel for the Web
Update your individual regional format settings directly within Excel for the Web to accept your preferred date formats.
This method allows you to change the locale for your own account, enabling Excel to recognize date formats specific to your region, such as German dates, without affecting other users.
Click on 'File' in the top-left corner of the ribbon menu, then select 'Options' from the sidebar.
Click on 'Regional Format Settings' (or 'Change regional format settings') from the available menu options.
Choose your appropriate regional format, such as German, from the dropdown list to apply the correct date and number formats.

Change Organization-Wide Regional Settings (Admins Only)
If the date format needs to be updated for all users in the organization, an administrator must change the settings at the SharePoint or OneDrive level.
Handle Dates and Formats Seamlessly with WPS Office
Tired of dealing with web-based regional setting conflicts and tenant restrictions? WPS Office is a free, lightweight desktop alternative that automatically syncs with your computer's local date and time formats. Enjoy seamless offline and online document editing without format rejections.
- 1. Download and Install: Download WPS Office for free from the official website and install it on your PC or Mac.
- 2. Open Your Spreadsheet: Launch WPS Spreadsheets and open your existing Microsoft Excel workbook.
- 3. Enter Dates Naturally: Type your dates in your standard local format. WPS automatically respects your system's regional preferences without extra web configuration.

Frequently Asked Questions
Why does Excel for the Web reject my non-US date formats?
By default, many Microsoft 365 environments apply US regional settings. If a data validation rule expects a US date (MM/DD/YYYY) and you enter a European date (DD.MM.YY), Excel will reject it as invalid data.
Will changing my regional settings in Excel for the Web affect other users?
No, changing the format via File > Options > Regional Format Settings only updates your personal view and data entry preferences. Other users viewing the same shared document will still see the dates in their own preferred formats.
How can I change the default date format for a shared Excel online workbook?
To change the default regional settings for everyone using a shared workbook, a Microsoft 365 administrator must update the regional settings of the hosting SharePoint site or OneDrive organization tenant.




