Converting from EST to EDT in Java

Question

I have a date which is in EST timezone. I need to convert it to EDT using Java 8.

I tried DateFormat.setTimeZone but didn't work. Please note my local server is in EDT time.

DateFormat edtFormat = new SimpleDateFormat("dd-MMM-YYYY HH:mm zzz");

edtFormat.setTimeZone(TimeZone.getDefault());

return edtFormat.format(date).toUpperCase(Locale.getDefault());