A Hard Day's Night

Correction: Tonight will not be the longest night in the history of Earth

The article below said that, due to the rotation of the Earth gradually slowing down over time, this winter solstice would feature the longest night ever.

I got this wrong. The Earth’s rotation is gradually slowing on an extremely long timescale, but on a shorter year-to-year basis, geologic factors can alter the speed as well.

Right basic idea— the rotation rate is slowing as a long-term trend — but wrong execution.