Enhancement Request : Decode exp to Human readable date format and timezone

currently decoded output prints as below

"exp": 1770794275

I would like the output to be below in addition to raw exp string. 

"expStr": "2026-02-11T02:17:55 EST"

or

"expStr": "2026-02-11T02:17:55 EST"

or the format

YYYY-MM-DDTHH24:MI:SS Z

Accept the dateformat as input command line parameter including timezone and output the date in that format. 