Newer Wi-Fi and some connected Honeywell thermostats, like the Lyric T5, VisionPro and certain Prestige models have a date option at the time setup that can include time adjustment for daylight savings time. If you have this feature, the thermostat will automatically update the time based upon the location that the device is registered in. If your thermostat does not have this auto-updating capability or the date is not enabled, you will need to manually adjust the time and date on your thermostat. Please follow the steps in the links bellow, according to the thermostat family model that you own.
|9000 family and VisionPro
||Lyric T family