You can now set personalized reminders when assigning due dates to cards or tasks. These reminders are sent via email to the card owner and watchers, helping your team stay aligned and proactive.

• A red bell icon will appear next to the due date when a reminder is set
• Reminders are based on your local timezone
  (Make sure your time zone is correctly set under Account > Localization)

Learn more:

• Due Dates Reminders on Cards
• Due Dates Reminders on Tasks