Date.prototype.getUTCHours()

const date1 = new Date("December 31, 1975, 23:15:30 GMT+11:00");
const date2 = new Date("December 31, 1975, 23:15:30 GMT-11:00");

console.log(date1.getUTCHours());
// Expected output: 12

console.log(date2.getUTCHours());
// Expected output: 10

var today = new Date();
var hours = today.getUTCHours();