this.setEnrollmentBeginDayDate(calendar.getTime());
if (calendar.getTime() != null) { this.setEnrollmentBeginDayDate(calendar.getTime()); } else { this.setEnrollmentBeginDayDate(null); }
    public void setEnrollmentBeginDay(Calendar calendar) {        this.setEnrollmentBeginDayDate(calendar.getTime());    }