SSP2012 - 5th International Symposium on Symmetries in Subatomic Physics

I review theoretical status of some models that were invoked in connection with "change of couplings in time" and "Lorentz invariance violation", and give my personal perspective on this subject. I then argue that the scope of the present experimental program can be expanded, in particular in the direction embracing the search for the short-time transient effects using precise clocks and magnetometers.