That's the error i get when parsing and convertin string to date:
"when converting a string to datetime, parse the string to take the date before putting each variable"

[DataMember(Name="date")]
        public string formattedEventDate {
            get {
                return String.Format("{0:f}", eventDateTime); }
            set {
                DateTime p = DateTime.Parse(value);
  //              DateTime parsed = DateTime.ParseExact(value, "yyyy-MM-dd HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);
                eventDateTime = p;
            }
        }
        public DateTime eventDateTime {get;set;}