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It didn't mention this in the article, but I believe that if the martian moons were getting closer to the planet, it would shorten the day (based on my understanding of the Earth/Moon system and how our day has been getting longer as the Moon has moved away). I wonder if they are.
I believe the moon must be orbiting faster than the planet's spin for that to happen (both the moving closer and the spin acceleration).
And, looking it up, that is indeed the case for Phobos, the larger of Mars' moons, and it is getting closer and will eventually either break up or crash into the planet, while also applying a force that increases Mars' spin rate.
Deimos is orbiting slower, so won't share that fate, though maybe it's orbital radius will increase enough for it to escape the Martian system, though I doubt it since it's already close to the Martian day.
Cool, thanks!
This got me curious as to when and how fast Phobos is spiraling inward and found this on NASA's website.