To set the time on a Honeywell smart thermostat, you first need to determine if your model is connected to Wi-Fi. If it is, the time syncs automatically and manual adjustments are locked; if it is not, you can set the time and date through the on-screen menu.
Before you begin: is your thermostat connected to Wi-Fi?
Wi-Fi enabled Honeywell thermostats, such as the Lyric T5, VisionPro, and certain Prestige models, automatically sync the time and date using internet sync when connected. If your thermostat is connected to Wi-Fi, manual time and date adjustments will not be available. If the displayed time is wrong on a Wi-Fi model, the issue is likely a connection problem. You should troubleshoot your network or connect honeywell smart thermostat to Wi-Fi network to restore automatic syncing. If you are setting up a new unit, you may first need to install honeywell smart thermostat before it can connect. Only proceed with manual steps if your thermostat is not connected to Wi-Fi or is a non-Wi-Fi model.
How to manually set the time on a Honeywell smart thermostat
For thermostats without Wi-Fi, or when Wi-Fi is disabled, follow these steps. The exact button sequence is consistent across many models, including the T6 Pro and FocusPro series.
- Press the Menu button on your thermostat.
- Press the + or up arrow until TIME appears on the display.
- Press Select (or NEXT on some models).
- You will see 12HR appear. Use the + or - (or up/down arrow) to choose between 12-hour or 24-hour clock format.
- Press Select (or NEXT) to confirm the format.
- The hour will flash. Use + or - (or up/down arrow) to adjust the hour.
- Press Select (or NEXT) to move to minutes.
- The minutes will flash. Use + or - (or up/down arrow) to adjust the minutes.
- Press Select (or SAVE & EXIT) to save and exit the time menu.
How to manually set the date on a Honeywell smart thermostat
After setting the time, or if you need to adjust the date separately, use these steps. The procedure is nearly identical to the time-setting process.
- If you are at the home screen, press Menu on your thermostat.
- Press the + or up arrow until DATE appears on the display.
- Press Select (or NEXT).
- The year will flash. Use + or - (or up/down arrow) to change the year.
- Press Select (or NEXT) to advance to the month.
- The month will flash. Use + or - (or up/down arrow) to choose the desired month.
- Press Select (or NEXT) to advance to the day.
- The day will flash. Use + or - (or up/down arrow) to change the date.
- Press Select (or SAVE & EXIT) to save and exit the date menu.
Adjusting for daylight saving time
Newer Wi-Fi models and some connected Honeywell thermostats have a date option in the time setup that includes automatic adjustment for daylight saving time. If this feature is present, the thermostat will automatically update the time based on the registered location of the device. If your thermostat does not have this auto-updating capability or the date is not enabled, you will need to manually adjust the time by one hour. There is not always a dedicated DST setting; on manual models, simply repeat the time-setting steps above and change the hour forward or backward as needed.
What to do after a power outage
When the thermostat is powered up for the first time after a power outage, it will automatically prompt you to set the time and date. If you need to adjust these settings after that initial prompt, use the manual steps provided above. If you need to restore full programming functionality, you may need to program the Honeywell T6 Pro smart thermostat or, if the issue persists, reset a smart thermostat to clear any corrupted settings.
For the wider topic, see reset a smart thermostat.
