bad-year-format.m

#import <Foundation/Foundation.h>

int main(int argc, char *argv[]) {
    @autoreleasepool {
        NSDateFormatter *goodDateFormatter = [[NSDateFormatter alloc] init];
        goodDateFormatter.dateFormat = @"dd-MM-yyyy HH:mm:ss.SSS";

        NSDateFormatter *badDateFormatter = [[NSDateFormatter alloc] init];
        badDateFormatter.dateFormat = @"dd-MM-YYYY HH:mm:ss.SSS";
        
        NSDate *now = [NSDate date];
        
        printf("Good: %s\n", [[goodDateFormatter stringFromDate:now] UTF8String]);
        printf("Bad: %s\n", [[badDateFormatter stringFromDate:now] UTF8String]);
    }
}

/*
Output:

Good: 29-12-2014 08:53:43.114
Bad: 29-12-2015 08:53:43.114

*/