Precision is milliseconds represented in a Java Long Integer.
Date Range is roughly +/- 292 million years.
This helps resolve some of my issues.
I'm not sure how leap-seconds are handled with Joda-Time.
The recommendation from the atomic time community is that computer
systems implement a leap-second incrementally to accommodate a gradual
change over a period of 100 seconds. This maintains consistency in
applications that interface with timestamped databases without need
to implement a discontinuity.