Riddle: 10 points. Why does the Earth slow it's rotation when it's winter.....?

"It turns out that during the Northern Hemisphere winter, the winds - which are predominantly west to east - are stronger," Salstein said.

The more forceful winds double the angular momentum of the atmosphere. Angular momentum is a conserved quantity in nature - the example usually given is the spinning ice skater conserving angular momentum by speeding up when she brings her arms in.

In this case, the whole system - comprised of the spinning Earth and swirling atmosphere - adjusts to the blustery winter months by slowing down the solid Earth's rotation. This means the days get longer - by a few thousandths of a second.

because it feels like it!

can the world not slow down it's rotation without it's motives being questioned?

It doesn't. The days seem longer because of how the Earth is tilted on it's axis.

So Santa can get around the world in one night...?