Quick follow-up @Prof_Techno if you have time 
So for me this will be perfect, because in my use case I mark in the calendar when I want the heating to turn on in comfort mode, and that avoids having to note the cases where it’s not in comfort mode but in standby.
Do you have an example calendar? Screenshot if possible?
@Prof_Techno Actually, @cicoub13 kindly developed an implementation of the “does not contain” to meet your need, and we’d like to test it before rolling it out to production.
However, I must admit I’m having trouble understanding your messages; they aren’t very clear to me. It would be great if you could phrase them in a more readable and detailed way.
To help us properly test your use case, could you explain concretely how to reproduce it? If we had to create a minimal calendar and an associated scene, what steps would we need to follow?