And in cases where it doesn't have any communication mechanisms with the outside world, telling it its 1990 again in 20 years isn't going to be a problem. Yah

And in cases where it doesn't have any communication mechanisms with the outside world, telling it its 1990 again in 20 years isn't going to be a problem. Yah the time on the thermostat will be wrong, but if no one has upgraded it in that long, its probably ok, put a piece of tape over it.