Thank you emme for your answer. In fact I already use time and device scripts.
My question was more : is it possible to change the time set in the planning of the switch with lua ?

Hi everyone, I'm trying to make predictive the ignition time of my heaters according to the temperature in the room (i.e. : I want a temperature at a time in a room, start of the heater ignition is automated). My idea was to use a dummy timed switch and then modify the ignition time with lua, would ...

Same problem here with Domoticz premium. Doesn't work with Dometica neither...
So no solution yet.