JsPHP: a JavaScript library providing the PHP API

function gmdate (format, timestamp) {
    // http://jsphp.co/jsphp/fn/view/gmdate
    // +   original by: Brett Zamir (http://brett-zamir.me)
    // +   input by: Alex
    // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
    // -    depends on: date
    // *     example 1: gmdate('H:m:s \\m \\i\\s \\m\\o\\n\\t\\h', 1062402400); // Return will depend on your timezone
    // *     returns 1: '07:09:40 m is month'
    var dt = typeof timestamp === 'undefined' ? new Date() : // Not provided
			typeof timestamp === 'object' ? new Date(timestamp) : // Javascript Date()
			new Date(timestamp * 1000); // UNIX timestamp (auto-convert to int)
    timestamp = Date.parse(dt.toUTCString().slice(0, -4)) / 1000;
    return this.date(format, timestamp);
}