Baseline.Conversion.DateTimeConverter.GetDateTime C# (CSharp) Method

        public static DateTime GetDateTime(string dateString)
        {
            var trimmedString = dateString.Trim();
            if (trimmedString == TODAY)
            {
                return DateTime.Today;
            }

            if (trimmedString.Contains(TODAY))
            {
                var dayString = trimmedString.Substring(5, trimmedString.Length - 5);
                var days = int.Parse(dayString);

                return DateTime.Today.AddDays(days);
            }

            if (isDayOfWeek(dateString))
            {
                return convertToDateFromDayAndTime(dateString);
            }

            if (iso8601Expression.IsMatch(trimmedString))
            {
                //Thank you jon skeet : http://stackoverflow.com/questions/10029099/datetime-parse2012-09-30t230000-0000000z-always-converts-to-datetimekind-l
                DateTime result;
                var success = DateTime.TryParseExact(trimmedString, "yyyy-MM-dd'T'HH:mm:ss.fffffff'Z'", CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out result);

                if (success) return result;
            }

            return DateTime.Parse(trimmedString);
        }