system
Given the following post, respond as if you're commenting on Reddit:
human
Is it pure coincidence that the rotation rates of Mars and Earth are both 24 hours (-4 & +39 min)?

And maybe this isn't the same question, but: Is there such a thing as non-coincidental rotational resonance between bodies not orbiting each other?
gpt
It's just a coincidence, with a large enough set of known planets you could say if it was an uncommon speed.  But as you point out, their days are only roughly 24 hours, it's your choice of unit and rounding that creates the illusion if a pattern.