To set the date on the Braun ExactFit 3 Blood Pressure Monitor, you can follow these steps based on the typical setup process for such devices:

1. Power On: Turn on the blood pressure monitor by pressing the power button.
2. Menu Navigation: Look for a button or option that allows you to access the settings or menu. This is often marked with a symbol like a gear or settings icon.
3. Date and Time Settings: Navigate through the menu options until you find the section for setting the date and time.
4. Set Date and Time: Use the arrow or navigation buttons to adjust the date and time to the correct values. You may need to press a 'set' or 'ok' button to confirm each change.
5. Save Changes: Once you have set the correct date and time, save the changes and exit the settings menu.

For specific instructions, it is recommended to refer to the owner's manual that comes with the Braun ExactFit 3 Blood Pressure Monitor, as the exact steps may vary slightly.