I need to get as “ist” or “est” from a user-based location from JavaScript date

I am using JavaScript date method for date and getting mentioned result.

const d = new Date();

output is: Tue May 07 2024 14:57:43 GMT+0530 (India Standard Time)

But I need this format

IST instead of India Standard Time

Tue May 07 2024 14:57:43 GMT+0530 (IST)