Open Radar

 
Summary:

The following code:

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ssZ";
    
    NSDate *now = [NSDate date];
    NSLog(@"%@: %@", dateFormatter.locale.localeIdentifier, [dateFormatter stringFromDate:now]);
    
    dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
    NSLog(@"%@: %@", dateFormatter.locale.localeIdentifier, [dateFormatter stringFromDate:now]);
    
    dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_GB"];
    NSLog(@"%@: %@", dateFormatter.locale.localeIdentifier, [dateFormatter stringFromDate:now]);

Gives the following output:

2013-08-22 22:30:33.937 DateTest[5277:60b] en_GB: 2013-08-22T10:30:33 PM+0100
2013-08-22 22:30:33.942 DateTest[5277:60b] en_US: 2013-08-22T22:30:33+0100
2013-08-22 22:30:33.945 DateTest[5277:60b] en_GB: 2013-08-22T22:30:33+0100

Steps to Reproduce:

NB: this can only be replicated on a device, since there is no way to set the iOS 6.1 simulator to use a 12-hour clock while the locale is set to en_GB.

1. Settings > General > International > Region Format, choose United Kingdom
2. Settings > General > Date & Time, turn 24-Hour Time to OFF
3. Start an iOS project in Xcode, paste the above code into your app delegate's -applicationDidBecomeActive: method and run

Expected Results:

en_GB: 2013-08-22T22:30:33+0100
en_US: 2013-08-22T22:30:33+0100
en_GB: 2013-08-22T22:30:33+0100


Actual Results:

en_GB: 2013-08-22T10:30:33 PM+0100
en_US: 2013-08-22T22:30:33+0100
en_GB: 2013-08-22T22:30:33+0100

Note: the same occurs on iOS 7 beta 5, but the PM in the first line is in lower case:

en_GB: 2013-08-22T10:30:33 pm+0100
en_US: 2013-08-22T22:30:33+0100
en_GB: 2013-08-22T22:30:33+0100

Regression:

Unknown

Notes:

n/a