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 commentAnonymous commented
anything is better than the US centric format. I work in the UK and communicate internationally, at the very least MS should adopt an ISO format such as yyyy-mm-dd if the logical ascending order of dd-mm-yyyy is too confusing