Turning a DateTime into a Friendly String

Over at http://www.primershee.com/Forum.aspx, the date column shows a friendly string version of when each post was last updated.  I used the following extension method…

        public static string ToFriendlyString(this DateTime date)
        {
            if (date.DayOfYear < DateTime.Now.DayOfYear)
                return date.ToString();
            else
            {
                TimeSpan span = DateTime.Now.Subtract(date);
                if (span.Hours >= 1)
                    return span.Hours + " Hours Ago";
                else if (span.Minutes >= 1)
                    return span.Minutes + " Minutes Ago";
                else return span.Seconds + " Seconds Ago";
            }
        }