WhastApp like displayable time

DisplayableTime.java

private String getDisplayableTime(long value) {
    SimpleDateFormat formatter = new SimpleDateFormat("hh:mm a", Locale.getDefault());
    Long mDate = System.currentTimeMillis();
    if (mDate > value) {
        long difference = mDate - value;
        final long seconds = difference / 1000;
        final long minutes = seconds / 60;
        final long hours = minutes / 60;
        final long days = hours / 24;
        final long months = days / 31;
        final long years = days / 365;

        if (seconds < 86400) {
            return formatter.format(new Date(value));
        } else if (seconds < 172800) {// 48 * 60 * 60
            return "yesterday";
        } else if (seconds < 2592000) { // 30 * 24 * 60 * 60
            return days + " days ago";
        } else if (seconds < 31104000) { // 12 * 30 * 24 * 60 * 60
            return months <= 1 ? "one month ago" : days + " months ago";
        } else {
            return years <= 1 ? "one year ago" : years + " years ago";
        }
    }
    return "now";
}