That's right, notifications for due dates are only sent out 24 hours prior to the due date, and it's not currently possible to configure or change that.
If you'd prefer to get a notification at the due date time (or any other configured time!), you may want to integrate Trello with a third-party app such as Google Calendar. From there, you can use their apps to customize the notifications.
You’re invited to our first ever Trello User Groups Good news for current and aspiring Trello enthusiasts! We’re launching Trello User Groups so that you can network, share ideas, solve ...
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