How to Set Timezone on WebSphere Application Server

It’s actually quite easy, but a little tricky. This is how i do it,
1. Start the administrative console.
2. In the topology tree, expand Servers and click Application Servers.
3. Click the name of the application server for which you want to set the time zone.
4. On the application server page, click Process Definition.

5. On the Process Definition page, click Java Virtual Machine.
6. On the Java Virtual Machine page, click Custom Properties.
7. On the Custom Properties page, click New.
8. Specify user.timezone in the Name field and timezone in the Value field, where timezone is the supported value for your time zone.
9. Click Apply.
10. Save the configuration
In this example, i’m setting my timezone as Asia/Jakarta

user.timezone=Asia/Jakarta

http://edwin.baculsoft.com/2011/08/how-to-set-timezone-on-websphere-application-server/