Am I getting the wrong notification time on iOS?

You need to set the current time format from AM / PM to the LocalDate property of FireDate in order to trigger alarms at the moment.

Below method is used to convert your hours, minutes and periods (AM / PM) to the current date format .. so that it starts the alarm with the specified time.

// Add this method

- (NSDate *)dateModifiedWithHours:(NSString *)hours
                           minutes:(NSString *)minutes
                         andPeriod:(NSString *)period
{
    NSDate *dateModified = NSDate.date;

    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

    NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSMinuteCalendarUnit fromDate:dateModified];

    [components setMinute:minutes.intValue];

    int hour = 0;

    if ([period.uppercaseString isEqualToString:@"AM"]) {

        if (hours.intValue == 12) {
            hour = 0;
        }
        else {
            hour = hours.intValue;
        }
    }
    else if ([period.uppercaseString isEqualToString:@"PM"]) {

        if (hours.intValue != 12) {
            hour = hours.intValue + 12;
        }
        else {
            hour = 12;
        }
    }
    [components setHour:hour];

    dateModified = [calendar dateFromComponents:components];

    return dateModified;
} 

      

        
        
        
      

    

Modify your code below

NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
calendar.timeZone = [NSTimeZone defaultTimeZone];
calendar.locale = [[NSLocale alloc]initWithLocaleIdentifier:@"en_US_POSIX"];

NSDateComponents *currentTimeComponents = [calendar   components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute fromDate:[NSDate date]];
currentTimeComponents.hour = [_hourlLabel.text intValue];
currentTimeComponents.minute = [_minuteLabel.text intValue];
currentTimeComponents.second = 00;
NSDate *date = [calendar dateFromComponents:currentTimeComponents];
NSLog(@"User set date: %@",date);


UILocalNotification *localNotification = [[UILocalNotification alloc] init];
localNotification.repeatInterval = NSCalendarUnitDay;
localNotification.timeZone = [NSTimeZone defaultTimeZone];


NSDate *firedModifiedDate = [self dateModifiedWithHours:@"5"
                                               minutes:@"51"
                                             andPeriod:@"pm"];

// Schedule the notification
localNotification.fireDate = firedModifiedDate;
localNotification.alertBody = @"It has notification from xxxx";
localNotification.alertAction = @"Show me the item";
localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;
localNotification.soundName = @"clockalarmfrog.mp3";

[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
NSLog(@"User setup local notifications: %@",localNotification);

NSTimeInterval secs = [localNotification.fireDate timeIntervalSinceDate:[NSDate date]];
NSLog(@"animation time duration in NSTimeInterval: %f",secs);

      

        
        
        
      

    

Then your log looks like below

2015-05-29 17:21:06.099 xxxx[651:12248] User setup local notifications:  <UIConcreteLocalNotification: 0x7fd9a8c7de60>{fire date = Friday, May 29, 2015 at 5:51:00 PM Bangladesh Standard Time, time zone = Asia/Dhaka (GMT+6) offset  21600, repeat interval = NSCalendarUnitDay, repeat count =     UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, May 30, 2015 at 5:51:00 AM Bangladesh Standard Time, user info = (null)}

      

        
        
        
      

    

Hope this helps you ... fix it.