Hi Prince,
In Reactive Application OutSystems automatically convert datetime as per the user's timezone. Please see the below link -
https://www.outsystems.com/forums/discussion/69618/reactive-app-disable-showing-dates-in-client-timezone/
If you want TimeZone conversion on server side then you can use below extensions -
You can use TimeZone forge component "ConvertFromTimeZone" action for that -
https://www.outsystems.com/forge/component-overview/500/time-zone

Thanks
Vinod