“The polar ice sheet is moving at a rate of roughly 10 m per year in a direction between 37° and 40° west of grid north, down towards the Weddell Sea. The Geographic South Pole is marked by a stake in the ice alongside a small sign; these are repositioned each year in a ceremony on New Year's Day to compensate for the movement of the ice”

South Pole - Wikipedia

Scientific American

Scientists Just Moved the South Pole. Here’s Why

Antarctica’s New Year’s celebration is unlike any other: every January 1 scientists physically move the South Pole. This is why