GeoOrientationData

GeoOrientationData[date,prop] gives the value of the property prop about the orientation of the Earth on the given date.

GeoOrientationData[date,prop,"variant"] gives the specified variant of the property prop on the given date.

Examples

Get the polar motion on a specific date:

GeoOrientationData[Today, "PolarMotion"]

Please visit the official Wolfram Language Reference for more details.