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). But when it is connected, it gets the time and date from the internet. So in the connected times, you cannot set it yourself. But when it is disconnected, you can. Thus, this piece details how to change time and day on Honeywell RTH9580WF thermostat manually when the internet is not available.
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.
2. Tap the Time/Date Square
This button is where the pink arrow points in the last picture.
3. Tap the Set Time Button to Continue with How to Change Time and Day on Honeywell Thermostat
The Set Time button brings up the Set Time screen, as shown next.
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.
6. Tap the Set Date Button to Move Forward with How to Change Time and Day on Honeywell Thermostat
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.
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.
9. Tap the Previous Menu Button to Continue with How to Change Time and Day on Honeywell Thermostat
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.
10. Done with How to Change Time and Day on Honeywell Thermostat !
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.
Other Posts About the Honeywell RTH9580WF Thermostat
- Honeywell RTH9580WF WiFi Setup Instructions
- Change WiFi Network on Honeywell Smart Thermostat RTH9580WF
- How to Change Honeywell Thermostat Temperature Setting
- Connecting Amazon Echo Dot to Honeywell Thermostats
- How to Reset Honeywell Thermostat RTH9580WF
References for Change Time and Day on Honeywell RTH9580WF Thermostat
- Honeywell RTH9580WF not updating time from ThermostatForums.com
- User Guide for the RTH9580WF Thermostat from Honeywell
Revision History
- 2019-04-12: Added key phrase targeting, more tags, and removed ad code.
- 2017-03-03: Originally published.