Date and Datetime format in TWebClientDataset.GetPendingUpdates

Well,
given that I don't want to waste your time, but that I have problems that often block my work, tell me how I can "digest" and save this date, coming from TWebClientdataset.GetPendingUpdates: "f24_datanascita":"1972-12-21:T00:00:00.000Z"
in Xdata, where the field in Aurelius Class is this:
[Column('f24_datanascita', )]
Ff24_datanascita: TDate;

When the service call deserialize (with TXdataJsonServerDeserializer), in
Xdata.Json.Converter I have an exception in
Function TXDataJsonObjectConverter.GetConverter(....)
at row Result:= Converters.Get(PropInfo.RttiInfo.RealType.Handle).

I also set DefaultTimeZoneMode: TTimeZoneMode.Ignore (Bcl.Utils).
But the exception in Xdata is always present.
Note: If I pass a date formatted "yyyy-mm-dd" everything works.