JavaTimestampTest.java

import java.text.SimpleDateFormat;
import java.util.Date;

public class JavaTimestampTest {

     public static void main(String []args){
        // long timestamp = new Date().getTime();
        long timestamp = 1_591_768_420_177L - 8_610_000_000L;
        
        Date date = new Date(timestamp);
        
        // F - increase by every 7 days of the month
        // W - increase by sunday of the month
        
        // String format = "yyyy-MM-dd'T'HH:mm:ss'.'SSSZ yyMM";
        String format = "w W F E dd-MM-yyyy'T'HH:mm:ss'.'SSSZ";
        
        SimpleDateFormat formatter = new SimpleDateFormat(format);
        String result = formatter.format(date);
        
        System.out.println("Timestamp: " + timestamp);
        System.out.println("Format:  " + format);
        System.out.println("Result: " + result);
     }
}