When I am restless in the winter, the landscape around me doesn't seem enough. These few acres of woods and homes are just a taste, only a promise of the great world.
But when I go too far away, I gather my landmarks of home around me. Distant locations only make sense against my private gauge.
Time benefits from a master point like Greenwich; from that arbitrary set point, we can know the sun throughout the world, and even plot the instant and the physical place where the past and future blend to a single day, balance in a temporal vacuum.