'How to display current time if json file contains timezone information in this form "UTC+01:00" ? Using JavaScript

How to manage information about the time, for example, in the time zone "UTC + 01: 00" to be able to display in the the correct way the time in a given place? How do I convert this information into javascript? So, in other words. The idea is that someone at any time, using my website, anywhere in the world could find out what is the current time of someone else who has the time zone "UTC + 01: 00". The json file contains information about the time zone exactly in this form "UTC + 01: 00"



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