Determining the Day-of-Week for a Particular Date
The day-of-week is an integer value where 1 is Sunday, 2 is Monday,
..., and 7 is Saturday
Calendar xmas = new GregorianCalendar(1998, Calendar.DECEMBER, 25);
int dayOfWeek = xmas.get(Calendar.DAY_OF_WEEK); // 6=Friday
Calendar cal = new GregorianCalendar(2003, Calendar.JANUARY, 1);
dayOfWeek = cal.get(Calendar.DAY_OF_WEEK); // 4=Wednesday
day of date