ASP.NET MVC Html helper for showing a UTC date from a server in the timezone of a browser

HtmlHelperExtensions.cs

public static MvcHtmlString LocalDateTime(this HtmlHelper helper, DateTime utcDateTime)
{
    return new MvcHtmlString(
        String.Format(
            "<script>var d=new Date('{0}');document.write(new Date(d.getTime()-d.getTimezoneOffset()*60000))</script>",
            utcDateTime.ToString("g")));
}