title: How to manually update timezone in JDK?
body: <p>In OracleJDK, timezone updates are done using Oracle's tzupdater tool. 
  I use OpenJDK (zulu binary offered by Azul) and I want to update its timezone to the latest IANA timezone.
  What exactly does it mean to update timezone? How can I do it manually? Thanks in advance.  </p>