PrettyDateTime class

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

public class PrettyDateTime {
    static int second = 1000;   //milSec
    static int fewSeconds = 5 * second;
    static int aMinute = fewSeconds * 12;
    static int aFewMinute = aMinute * 5;
    static long anHour = aFewMinute * 12;
    static long aDay = anHour * 24;
    static long aWeek = aDay * 7;
    static long anYear = aDay * 365;

    public static String convertToPrettyDateTime(long milSec)
    {
        long diff = System.currentTimeMillis() - milSec;
        System.out.println(diff);
        if (diff < fewSeconds)
            return "Just now";
        else if (diff < aMinute)
            return "A few seconds ago";
        else if (diff <aFewMinute)
            return "A few minutes ago";
        else if (diff < anHour)
        {
            SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss a");
            return format.format(new Date(milSec));
        }
        else if (diff < aDay)
        {
            SimpleDateFormat format = new SimpleDateFormat("hh:mm a");
            return format.format(new Date(milSec));
        }
        else if (diff < aDay * 2)
        {
            SimpleDateFormat format = new SimpleDateFormat("'Yesterday at' hh:mm a");
            return format.format(new Date(milSec));
        }
        else if (diff < aWeek)
        {
            SimpleDateFormat format = new SimpleDateFormat("E 'at' hh:mm a");
            return format.format(new Date(milSec));
        }
        else if (diff < anYear)
        {
            SimpleDateFormat format = new SimpleDateFormat("dd MMM 'at' hh:mm a");
            return format.format(new Date(milSec));
        }
        else
        {
            SimpleDateFormat format = new SimpleDateFormat("dd MMM YYYY 'at' hh:mm a");
            return format.format(new Date(milSec));
        }
    }
    /*public static void main(String[] args) throws InterruptedException {

        long time = System.currentTimeMillis();
          // display time and date using toString()
      System.out.println(convertToPrettyDateTime(time - aDay  * 2 - 10));

    }*/

}