NSDate Output incorrectly [duplicate]

Question

Possible Duplicate:
Getting date from [NSDate date] off by a few hours

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"M-d-yyyy H:mm"];

NSDate *start= [dateFormatter dateFromString:@"10-24-2012 12:15"];
NSDate *end  = [dateFormatter dateFromString:@"10-24-2012 15:30"];

When I print out

   NSLog(@"------main_event start %@", start);
   NSLog(@"-----main_event end %@", end);

The result is

         ---main_event start 2012-10-24 19:15:00 +0000
         ---main_event end 2012-10-24 22:30:00 +0000

Now, it looks like the time added 7 hours automatically, 12:15 becomes 19:15, and 15:30 becomes 22:30.

Why?

Answer 1

because the timezone, where your device is located, is UTC-7.

The output is in UTC (hence the +0000), as a single NSDate will always print out it's time in UTC.

If you use an NSDateFormatter to output the date, it will take your locale in account. See my answer here: NSDate date method returns wrong result

Answer 2

These are correct results. When you use NSLog to output an NSDate object, it displays in GMT. The parsing was done in your local timezone. NSDate objects are alway in GMT. If you want to print the NSDate object in your local timezone then you need an NSDateFormatter to print the date.