if [[ "$( date -d "${itemTime}" +%s)" -lt  "$( date -d "$1 days ago" +%s )" ]]; then
      echo "go do"
  fi

String tt = "2018-02-19T13:39:15Z";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssX");
Date dt = sdf.parse(tt);
long epoch = dt.getTime();
int res = (int)(epoch/1000);
System.out.println(res);

int days = 1;
LocalDate now = LocalDate.now();
LocalDate tenDaysAgo = now.minusDays(days);

ZoneId zoneId = ZoneId.systemDefault();
long epochs = tenDaysAgo.atStartOfDay(zoneId).toEpochSecond();
System.out.println(epochs);

1519047555
1518994800

echo $( date -d "2018-02-19T13:39:15Z" +%s)
  echo $( date -d "1 days ago" +%s )

1519047555
1519053480