with the engine running you can reset the clock but if you turn the engine off the clock returns to the last time, if going on a long journey i set mine before i set off as long as you dont turn the engine off it will be ok, also you can set it with key in 2 position when stationary but if you start the engine the time lapse is enough to put it back to square one. Honda uk know of the problem and are working on a fix but no date as yet.