Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Date/Time- screen.

How to Change Time and Day on Honeywell Wi-Fi Thermostat RTH9580WF




The only time you can manually set the time and date on the Honeywell RTH9580WF (or any of the 9000 series color touchscreen models), is when the thermostat is not connected to Wi-Fi (the internet).  When it is connected, it gets the time and date from the internet, and so, you cannot set it yourself.  But when it is disconnected, you can, and this piece details how to do that.



How to Change Time and Day on Honeywell Wi-Fi Thermostat RTH9580WF

1. Bring Up the Thermostat’s Home Screen

Note how it looks in the next picture, when the thermostat is disconnected from the internet.  No outdoor temperature and outdoor humidity display in this case.  It is ONLY in this case, that you can change the time and date manually.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying its Home screen as it appears when not connected to the Internet, with the Time Date area highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying its Home screen as it appears when not connected to the Internet, with the Time Date area highlighted.



2. Tap the Time/Date Square

This button is where the pink arrow points in the last picture.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Time / Date- screen, with the -Set Time- button highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Time / Date- screen, with the -Set Time- button highlighted.

3. Tap the   Set Time  Button

The  Set Time  button brings up the  Set Time  screen, as shown next.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Set Time- screen, with the -Done- button highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Set Time- screen, with the -Done- button highlighted.



4. Use the   UP   and   DOWN   Arrow Buttons to Set the Time

Find these controls beside each of the Hour, Minute, and AM/PM fields.  The arrows beside the Hour field increase or decrease the hour number when pressed.  So too do the arrows near the Minute field, for the minute value.  And finally, the AM/PM arrows change the setting of this field from AM to PM and back again.

5.  When the Correct Time Displays, Press the   Done   Button

This returns you to the   Time / Date   screen, as shown next.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying the -Time / Date- screen with the -Set Date- button highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying the -Time / Date- screen with the -Set Date- button highlighted.

6. Tap the   Set Date   Button

See the   Set Date   button location, pointed at by the pink arrow in the previous picture.

This brings up the   Set Date   screen, as shown next.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying the -Set Date- screen, with the -Done- button highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying the -Set Date- screen, with the -Done- button highlighted.

7. Use the   UP   and   DOWN   Arrow Buttons to Set the Date

beside each of the Month, Day, and Year fields.  The arrows beside the Month field increase or decrease the Month number when pressed, as do the arrows near the Day-of-the-month field, and the Year value.



8.  When the Right Date Displays, Press the   Done   Button

This returns you to the   Time / Date   screen, as shown next.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Date/Time- screen, with the -Done- button highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Date/Time- screen, with the -Done- button highlighted.

9. Tap the   Previous Menu   Button

This takes you back to the  Home  screen, as shown next.  note that the displayed time and date now appear here as you set them.

Picture of the Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Home- screen, as it appears with no internet connection, with the manually set time and date highlighted.
Honeywell RTH9580WF Wi-Fi thermostat, displaying its -Home- screen, as it appears with no internet connection, with the manually set time and date highlighted.



10. Done!

The thermostat day and time have now been manually set successfully.  However, remember that if you connect the RTH9580WF to the internet, it will erase your manual date / time settings, and update them to the current date and time as provided by internet time servers.

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References

Revision History

  • 2017-03-03: Originally published.