A while back I whined that I had several Heltun thermostats and could not simply flick a switch to set the time on them (COMMAND_CLASS_CLOCK). They do expose configuration parameters for time so I have used that via Node RED.
Node-RED config for setting ZWave parameters.xml (2.2 KB)
Note that the file is not really .xml (I had to set that to upload it) and should be imported into Node-RED to create nodes etc. I have tried to comment things as best I can in the function node.