date and time notification not firing in android

Hi in my application i designed application with date and time i want to fire the notification on particular time and date.

Now My problem if i changed the system date also notification firing i don't want like that based on current date and system date i want to fire the notification.

Can anyone please help me how to solve the issue

MyView class

public class MyView extends Activity {
TextView tv;
Button btn;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Calendar Calendar_Object = Calendar.getInstance();
Calendar firingCal = Calendar.getInstance();
firingCal.set(Calendar.DAY_OF_MONTH, 10);
firingCal.set(Calendar.MONTH, 7);
firingCal.set(Calendar.YEAR, 14);
Calendar firingCal1 = Calendar.getInstance();
firingCal1.set(Calendar.HOUR_OF_DAY, 15);
firingCal1.set(Calendar.MINUTE, 55);
firingCal1.set(Calendar.SECOND, 0);
// MyView is my current Activity, and AlarmReceiver is the
// BoradCastReceiver
Intent myIntent = new Intent(MyView.this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MyView.this,
0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
/*
* The following sets the Alarm in the specific time by getting the long
* value of the alarm date time which is in calendar object by calling
* the getTimeInMillis(). Since Alarm supports only long value , we're
* using this method.
*/
alarmManager.set(AlarmManager.RTC_WAKEUP, firingCal.getTimeInMillis(),
pendingIntent);
alarmManager.set(AlarmManager.RTC_WAKEUP, firingCal1.getTimeInMillis(),
pendingIntent);
}
}

Thanks in adavance.

Updated code

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Calendar Calendar_Object = Calendar.getInstance();
/* Calendar firingCal = Calendar.getInstance();
firingCal.set(Calendar.DAY_OF_MONTH, 10);
firingCal.set(Calendar.MONTH, 7);
firingCal.set(Calendar.YEAR, 14);
Calendar firingCal1 = Calendar.getInstance();
firingCal1.set(Calendar.HOUR_OF_DAY, 23);
firingCal1.set(Calendar.MINUTE, 55);
firingCal1.set(Calendar.SECOND, 0);
*/
String input = "Sat Feb 17 2015";
Date date = null;
try {
date = new SimpleDateFormat("EEE MMM dd yyyy", Locale.ENGLISH).parse(input);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} //What ever might be your format
long milliseconds = date.getTime();
long millisecondsFromNow = milliseconds - (new Date()).getTime();
new CountDownTimer(millisecondsFromNow , 1000) {
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
//It's your date. Do your stuff here.
}
}.start();
// MyView is my current Activity, and AlarmReceiver is the
// BoradCastReceiver
Intent myIntent = new Intent(MyView.this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MyView.this,
0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
/*
* The following sets the Alarm in the specific time by getting the long
* value of the alarm date time which is in calendar object by calling
* the getTimeInMillis(). Since Alarm supports only long value , we're
* using this method.
*/
/*alarmManager.set(AlarmManager.RTC_WAKEUP, firingCal.getTimeInMillis(),
pendingIntent);
alarmManager.set(AlarmManager.RTC_WAKEUP, firingCal1.getTimeInMillis(),
pendingIntent);*/
}
}