How can we use symmetry to understand 1937?

Here is a Possiblity ....

• Reflect the present in 1937.

• That is ...

• Subtract 1937 from the current year 2009 --- the difference is a measly 72.

• Then subtract the 72 from 1937,

• you get 1865.

• Now that was a long time a go!

Let's call this Reflction in a Date. We'll apply it at least a few more times.

First, we need to make the problem richer.

Before we throw caution to the wind, we need additional symmetries!