mCalendar = Calendar.getInstance();
        DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {

            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear,
                    int dayOfMonth) {
                // Here I want to check if the date is good.
                // if its good - call GetPlayersList()
                // if not - raise a message and let user choose again
                mCalendar.set(Calendar.YEAR, year);
                mCalendar.set(Calendar.MONTH, monthOfYear);
                mCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                new GetPlayersList().execute(Utilities
                        .getAccessToken(AttendanceActivity.this));
            }

        };

        new DatePickerDialog(AttendanceActivity.this, date,
                mCalendar.get(Calendar.YEAR), mCalendar.get(Calendar.MONTH),
                mCalendar.get(Calendar.DAY_OF_MONTH)).show();

int dayOfWeek = mCalendar.get(Calendar.DAY_OF_WEEK);

if(dayOfWeek == 3) {
    // it is a Wednesday
} else {
    // it is not a Wednesday
}