Help with custom world time Clock JS code

Hi! I’ve got some world clocks on a site that i’m creating. And so far so good, but when it comes to Mumbai, the time difference is 4.5 hours. How can i change my custom code to include the half our difference that i need for Mumbai timer?

My JS skills aren’t very good. I understand the logic to it, but cant write the code my self.

Help is very much appreciated!

Best regards,
Atle


Here is my site Read-Only:
https://preview.webflow.com/preview/lt-nordic-new?utm_medium=preview_link&utm_source=designer&utm_content=lt-nordic-new&preview=b9c474570351cb7748747d38cbdac8cd&pageId=61b0aa9cf345a543f568d225&workflow=preview