I wrote an app that allows the user to enter data in a UITextField, and one of them allows them to enter in a specific date. I'm trying to have an alert appear in the iPhones Notification Center when the date is 15 hours away, even when the app is not running at all. EDIT: New code- - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { UILocalNotification *localNotif = [[UILocalNotification alloc] init]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"MMdd"]; NSDate *eventDate=[dateFormatter dateFromString:eventDateField.text]; localNotif.fireDate = [eventDate dateByAddingTimeInterval:-15*60*60]; localNotif.timeZone = [NSTimeZone defaultTimeZone]; localNotif.alertBody = @"Event Tomorrow!"; localNotif.alertAction = @"Show me"; localNotif.soundName = UILocalNotificationDefaultSoundName; localNotif.applicationIconBadgeNumber = 0; [[UIApplication...