Your location in this Universe isn't just described by spatial coordinates (where), but also by a time coordinate (when). It is impossible to move from one spatial location to another without also ...

If you were asked to describe how you can move through the Universe, you'd probably think of all the different directions you were free to move in. You could go left or right, forwards or backwards, ...

When designing a Data Warehouse we usually create a dedicated Time dimension table so that our Business Analysts can analyze the data by Year by Quarter by Month or whatever time period they require.