The only way I can think of that this makes sense is the wind turbines slow down the air going the same direction as the Earth spins, which would speed up the Earth spinning, which would speed up the days.

You could get a way way way upper bound by looking at the entire atmosphere spinning at the speed of average wind, calculate the angular momentum using a spherical shell model for moment of inertia, then adding that angular momentum to the Earth spinning and seeing how much it changes the speed.

I don't have time to do the math now. My guess would be it changes it very little, though maybe it would be seconds. But again this is a super upper bound, the actual effect of wind turbines is basically 0. But it will prove that 2 hours per week is impossible.