As an update, since we’ve still been seeing issues around date formatting, so we’re pursuing another fix that should help: If you’re using Planner within Teams, we will default to using the same language/local as Teams.
If you’re seeing this issue persist outside of Teams and your language/locale is set properly for your Office account, please let us know in the comments below!
The Planner Team
An error occurred while saving the commentGraeme commented
MS Teams > 'Tasks by Planner and To Do' shows the date format as US, but the Teams Approvals app and other Teams features correctly shows date format according to my regional settings.
I can't apply regional (English New Zealand) date format to Planner. I can't believe it has been more than 5 years and still Microsoft hasn't fixed this.