code: public static Date substractDaysFromDate(final Date date, final int substractDays)
  	{
  		final Calendar dateOnCalendar = Calendar.getInstance();
  		dateOnCalendar.setTime(date);
  		dateOnCalendar.add(Calendar.DATE, substractDays * -1);
  		return dateOnCalendar.getTime();
  	}
docs: Substract days to the given Date object and returns it.
  
  @param date
  The Date object to substract the days.
  @param substractDays
  The days to substract.
  @return The resulted Date object.