Joda Time

First things first, nothing to do with Yoda (even if at first glance somebody might be misleaded). Joda Time is a library which should replace the Java date and time classes (who's never clashed with them?). At the moment I'm just starting to play with it, tired of... the dark side. The library also offers the Interval class, that represents a time period between two timepoints. What I still have to find out is how to manage open intervals.