function zulu_date

function zulu_date(c) {
    var b = new Date(c),
        a = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
    return b.getDate() + " " + a[b.getUTCMonth()] + " " + String(b.getUTCFullYear()).slice(-2) + " " + ("00" + b.getUTCHours()).slice(-2) + ":" + ("00" + b.getUTCMinutes()).slice(-2) + "Z"
};