var now = new Date();

// oder so?
// var today = now.toLocaleDateString ();
// document.write (today);

var days = new Array ('Sonntag','Montag','Dienstag','Mittwoch','Donnerstag','Freitag','Samstag');
var months = new Array (
    'Januar','Februar','März','April',
    'Mai','Juni','Juli','August',
    'September','Oktober','November','Dezember');
var date = ((now.getDate() < 10) ? "0" : "") + now.getDate ();
function fourdigits (number)
{
    return (number < 1000) ? number + 1900 : number;
}

today = days[now.getDay ()] + ", " +
    date + ". " +
    months[now.getMonth()] + " " +
    (fourdigits(now.getYear()));

document.write (today);