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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
 
Date date = new Date();
try {
    date = sdf.parse(displayList.get(position).getTime());
} catch (ParseException e) {
    e.printStackTrace();
}
 
Calendar gc = new GregorianCalendar();
gc.setTime(date);
gc.add(Calendar.HOUR, -4);
Date updatedDate = gc.getTime();
 
String prettyTime = new PrettyTime().format(updatedDate);