What is the Best Practice for manipulating and storing dates in Java?

Question

What is the Best Practice for manipulating and storing Dates e.g. using GregorianCalendar in an enterprise java application?

Looking for feedback and I will consolidate

Answer 1

Joda time (100% interoperable with the JDK)

Joda-Time provides a quality replacement for the Java date and time classes. The design allows for multiple calendar systems, while still providing a simple API