PHP allows you to set the timezone for the session using date_default_timezone_set.
I want to do the same for my Java application. That is, dynamically change the timezone for the session. The timezone needs to dynamically change multiple times during the Java session.
I do NOT want to set the timezone for every instance of a date/time related object.
Also, I do not want to use a command line setting like "java -Duser.timezone=UTC"