OK. It would be nice if you could provide an example of what you want to happen. Please include the url of the json you access.
Here is a tool using the FormatDateTime block that probably would help. Not providing a link to the url and your Blocks preclude a specific application solution.
Use the above information along with a Clock component to convert the information in the time zone they are in using the UTC offset information. In the example instance you need to subtract 05 hours from the user's device's system time perhaps and write code to determine whether that process affects the data.
The Z, zzzz, X 'instructions you provide in the pattern determine what result you get regarding to the UTC zone information of a users' device. Provide a pattern like X to grab only the -05 in the example (time difference). Try it. Only you know what you want to do or expect to happen.
When you arrive at a solution, please post your solution. Thanks.
Regards,
Steve