/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.text.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
    Locale ptBR = new Locale("pt", "BR");
    SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyy", ptBR);
    SimpleDateFormat iso = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sssZ");
    GregorianCalendar calendar = new GregorianCalendar(ptBR);
    String data = "31/12/1900";
    calendar.setTime(sdf.parse(data));
    iso.setTimeZone(calendar.getTimeZone());
    System.out.println(iso.format(calendar.getTime()));		// your code goes here
	}
}

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