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Re: NSDate's GMT offset changing with month change.
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Re: NSDate's GMT offset changing with month change.


  • Subject: Re: NSDate's GMT offset changing with month change.
  • From: Ricky Sharp <email@hidden>
  • Date: Sat, 30 Sep 2006 17:14:25 -0500


On Sep 30, 2006, at 5:07 PM, Jordan Evans wrote:

I create two NSDates, but the only difference is the month, but the
hour and GMT offset changes, why?


The code:

int main (int argc, const char * argv[])
{
   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

	NSDate *dateOne = [NSDate dateWithString:@"2006-9-02 7:30:12 -0700"];
	NSDate *dateTwo = [NSDate dateWithString:@"2006-1-02 7:30:12 -0700"];

	NSLog(@"dateOne: %@", [dateOne description]);
	NSLog(@"dateTwo: %@", [dateTwo description]);

   [pool release];
   return 0;
}

The output:

2006-09-30 14:54:39.012 NSDateTest[6958] dateOne: 2006-09-02 07:30:12 -0700
2006-09-30 14:54:39.013 NSDateTest[6958] dateTwo: 2006-01-02 06:30:12 -0800

Looks like something to do with Daylight Saving Time. Do you honor DST in your time zone? As an experiment, try using a time zone that doesn't honor DST (e.g. Hawaii); my guess is that the times you construct will no longer be auto-adjusted.


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Ricky A. Sharp         mailto:email@hidden
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References: 
 >NSDate's GMT offset changing with month change. (From: "Jordan Evans" <email@hidden>)

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