IIRC at least one of the two other displays optionally take turn-by-turn remote guidances from the nav. So it can easily have a time data type added to that data, and they didn't. Though, all I researched for was for an outdated model of a car, and it seems one of three desynched clocks appear to be not be present anymore, and the desynced clock count must have gone down by one, unless they compensated for the loss by adding one.