How to change time zone of my 13c OMS from EDT to IST?

Hi All,

How to change time zone of my 13c OMS from EDT to IST?

There is ample documentation to change timezone of management agents but no documentation on how to change timezone of HOST OMS service... Why?

I need to change time zone of EM 13c OMS (13.1.0.0.0) to IST, mistakenly its installed with EDT (US time zone),

all other targets are migrated to IST using agent time zone procedure but still EM console service and Job services are displaying time in EDT which needs to be changed, Pls assist!

Thanks and Regards

Ashutosh