How to get the date time of client PC in asp.net

Put this javascript in Head tag, this script will create the cookie and then you can get this cookie in asp.net   code file.
 <script language="javascript" type="text/javascript">
        var dt = new Date();
        var tz = -dt.getTimezoneOffset();
        setCookie("localtime", tz, 30);
        function setCookie(c_name, value, exdays) {
            var exdate = new Date();
            exdate.setDate(exdate.getDate() + exdays);
            var c_value = escape(value) + ((exdays == null) ? "" : "; expires=" + exdate.toUTCString());
            document.cookie = c_name + "=" + c_value;
        }
Get Cookie value in ASPX.CS file

 int localTime = 0;
 HttpCookie cookieLT = HttpContext.Current.Request.Cookies["localtime"];
        if (cookieLT != null)
        {
            localTime = Convert.ToInt32(cookieLT.Value);
        }
This code will retunr the time difference bet the UTC and local time in minutes