It’s easy! This helps when you want your application to be in regional time zone.

Start the administrative console. In the topology tree, expand Servers » Application Servers. Click on application server for which you want to set the time zone On the application server page, click Process Definition»Java Virtual Machine»Custom Properties»New Specify user.timezone in the Name field and timezone in the Value field, where timezone is the supported value for your time zone. Click Apply/ok Save the configuration

I hope this helps you. Interested in learning Cloud Computing?