$(document).ready(function () {
    var currentDate = new Date();
    var currentHour = currentDate.getHours();
    var newCSS = document.createElement('link');
    newCSS.type = 'text/css';
    newCSS.rel = 'stylesheet';
    if (currentHour < 9 || currentHour >= 20) {
        newCSS.href = 'css/night.css';
    }
    else {
        newCSS.href = 'css/day.css';
    }
    $("head").append(newCSS);
    $(".satellite").html(currentDate.toTimeString());
});