would it be possible to update the stock thermostat drive so say once a week it sends a set time command. I'm guessing, if a device doesn't support it , it will get ignored at device end zwave.clockV1.clockSet(time).format()
I have nothing to add but I'm really curious if you want this because your thermostat has that much clock drift or if you cut its power often and it has no RTC with battery backup.
Their is a little drift but its mainly daylight saving.
Don't use the clock, just annoying when walking past and its wrong
Daylight saving needs to go away...