使用jquery获取格式为UTC 11:30,0的浏览器时区

有人建议我使用格式为“UTC+11:30,0”的浏览器时区吗 使用jquery，因为我只想在数据库中存储“UTC+11:30,0”

function calcTime(city, offset) {
    // create Date object for current location
    var d = new Date();

    // convert to msec
    // add local time zone offset
    // get UTC time in msec
    var utc = d.getTime() + (d.getTimezoneOffset() * 60000);

    // create new Date object for different city
    // using supplied offset
    var nd = new Date(utc + (3600000*offset));

    // return time as a string
    return "The local time for city"+ city +" is "+ nd.toLocaleString();
}

alert(calcTime('Bombay', '+5.5'));