To Convert a unix timestamp to humman readable string, use new Date() with parameter * 1000,
convert unix timestamp to GMT String,
console.log(new Date(1665539594 * 1000).toGMTString());
//output
Wed, 12 Oct 2022 01:53:14 GMT
To local string
console.log(new Date(1665539594 * 1000).toLocaleString());
//output
2022/10/12 09:53:14
To ISO string
console.log(new Date(1665539594 * 1000).toISOString());
//output
2022-10-12T01:53:14.000Z
To UTC string
console.log(new Date(1665539594 * 1000).toUTCString());
//output
Wed, 12 Oct 2022 01:53:14 GMT