You can set a deadline for when a project or an action card is due to be completed. When a due date is set, a badge with the date appears on the card.
The colour of the badge has the following meaning:
Dark grey, the due date is over 24h in the future
Orange, the due date is tomorrow
Red, the project or action is overdue
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How to edit or remove a due date?
How to add a due date?
Only members of the circle are allowed add due dates to the projects and actions of their circle, even without being directly assigned to it.
To add a due date to a project or action:
Open the project or action by clicking on it
Click on the Due date button
Select the desired date in the calendar

The due date will be visible on the project or action card.

How to edit or remove a due date?
Remove a due date by clicking on the date on the card and click the cross icon at the right of the date.
Edit a due date dit a date by clicking the date on the card, selecting a new date in the calendar.

See also
How to add, edit or delete projects
How to add, edit or delete actions
How to archive or delete project cards
Add a member or a role to a project card
Adding attachments to project cards
Adding due dates to project cards