The DE server comes with its own Java. It is located inside the install directory. The timezone information may need to be updated for new DST and timezone changes.
E.g. Linux/UNIX
/opt/CA/WorkloadAutomationDE/jre
Windows:
C:\Program Files\CA\WorkloadAutomationDE\jre
./java -jar /tmp/tzupdater.jar -l
Windows
java -jar C:\temp\tzupdater.jar -l
Note: The above examples indicate that tzupdater was placed in /tmp or C:\temp directory.4. Once update completes, restart the DE service