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The Moon's orbit has been growing over geological time and the Earth's day decreasing because of the transfer of angular momentum between the two via the tides.
Also, I just read that the Earth day has been getting longer.
Now you are telling me it is actually getting shorter??
Do you have a source for this?
By decreasing it means decreasing rate of spin.
So, the days are getting longer ,because the rate of rotation is decreasing.
That would make sense.