const date1 = new Date('December 31, 1975, 23:15:30 GMT+11:00');
console.log(date1.getUTCSeconds());
// expected output: 30
date1.setUTCSeconds(39);
console.log(date1.getUTCSeconds());
// expected output: 39
const date1 = new Date('December 31, 1975, 23:15:30 GMT+11:00');console.log(date1.getUTCSeconds());// expected output: 30date1.setUTCSeconds(39);console.log(date1.getUTCSeconds());// expected output: 39