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How to Change Project Online Date Format to British (UK)

Adam DavisAdam Davis Oct 10, 2026 868 views

Question details

The user needs to change the date format in Microsoft Project Online from American to British (UK) because changing the account language settings did not resolve the issue.

How to Change Project Online to the British Date Format
Product
Microsoft Project Online
Device & OS
not provided
Scenario
Managing project schedules where UK date formats (DD/MM/YYYY) are required for accurate reporting.
Observed behavior
Project Online continues to display American date formats (MM/DD/YYYY) even after the Microsoft account language settings have been updated to UK English.
Before you start

Ensure you have the necessary site administrator permissions in Project Online to access and modify the site's regional settings.

Solution 1Recommended

Update Regional Settings in the Project Online Web App

Change the site-level regional settings to enforce the British date format across your Project Online web application.

Microsoft Project Online relies on SharePoint site settings for its regional formatting. Changing your personal Microsoft account language is often not enough; the site's regional settings must also be explicitly configured to the United Kingdom to reflect the DD/MM/YYYY format.

1
Access Site Settings

Navigate to your Project Online web app and click on the gear icon (Settings) in the top right corner, then select 'Site settings' from the dropdown menu.

2
Open Regional Settings

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

3
Change the Locale

Locate the 'Locale' dropdown menu and change the region from English (United States) to 'English (United Kingdom)'.

4
Save Changes

Scroll to the bottom of the page and click 'OK' to apply the new regional settings.

5
Verify the Format

Test the new date format by opening Project Online in a different web browser or by launching an InPrivate/Incognito window to bypass cached data.

Update Regional Settings in the Project Online Web App
Date Format Updated: Your project dates will now consistently display in the standard British DD/MM/YYYY format across the web app.
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  1. 1. Launch WPS Spreadsheet: Open WPS Office and create a new Spreadsheet document for your project tracker.
  2. 2. Apply British Date Format: Select your date columns, right-click, choose 'Format Cells', and select the UK date format (DD/MM/YYYY) under the Date category.
  3. 3. Use Project Templates: Explore the WPS Template library to find ready-to-use project management and Gantt chart layouts.
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Frequently Asked Questions

Why didn't changing my Microsoft account language update the Project Online date format?

Project Online is built on SharePoint, which uses its own site-level regional settings to determine date and time formats. Your personal Microsoft account language settings do not override the site's default locale.

Will changing the regional settings affect other users on the Project Online site?

Yes, modifying the Site settings > Regional settings will change the default date format for all users accessing that specific Project Online site.

How can I force my browser to reflect the new date format immediately?

Browser caching can sometimes prevent new regional settings from displaying right away. To view the updated formats immediately, clear your browser cache or open the site in an InPrivate or Incognito window.

Can I use different date formats for different projects in the same Project Online site?

No, the regional settings dictate the date format for the entire site collection. All projects hosted on that specific site will share the same date formatting rules.