sure, but this is still just a consequence of the definition of "second" and a coincidental relationship between orbital period and day length. you can readily

sure, but this is still just a consequence of the definition of "second" and a coincidental relationship between orbital period and day length. you can readily see that no such relationship holds for any of the other planets in our system. unless i am grossly misunderstanding something, this is just an interesting tautology, similar to why torque and power curves for ICEs always cross at the same rpm.