UK date format - List created within SharePoint Site

Dear @Christopher French,

Good day! Welcome to Microsoft Q&A forum!

Based on your description, I understand that even though all your regional settings across the tenant and user level are configured to UK (en‑GB), SharePoint lists created within a SharePoint site are displaying dates in US format in date columns. However, when you create lists directly from Microsoft Lists, the UK date format is applied correctly. You’re looking for help understanding why this inconsistency is happening and how to ensure the correct UK date format is used in SharePoint site lists.To pinpoint the cause, could you please confirm:

• Have you checked the regional settings specifically at the SharePoint site level? (All Site Settings > Regional Settings) Is the locale set to English (United Kingdom)?
• Are the problematic lists created using “New List” inside a SharePoint site, or templates / imported structures?

Your confirmation would be very helpful in ensuring you receive the most suitable support!

In the meantime, kindly try the following suggestions to check what might have caused the issue:

• Verify SharePoint site regional settings:
  • Go to your SharePoint site
  • Click Settings > Site information > View all site settings > Regional Settings
  • 
  • Please ensure that: Locale = English (United Kingdom) and Time zone = correct UK region
  • Then save and refresh your list
• Recreate or update the column: Sometimes the format gets locked in when the column is first created
  • Try creating a new date column after confirming regional settings
  • Check if the new column respects UK formatting
• Try in InPrivate/Incognito mode or a different browser as this helps rule out caching or session-based formatting issues

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

Kindly let me know when there are updates or if you need further assistance. Any updates you’re able to share would be really helpful. I appreciate your time and look forward to hearing how things are going! 

Thank you for your time and patience.

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