NSString to NSDate is giving the wrong day [duplicate]

Question

I have this piece of code:

NSDateFormatter* df = [[NSDateFormatter alloc] init];
df.locale = [NSLocale currentLocale];
df.timeZone = [NSTimeZone localTimeZone];
df.timeStyle = NSDateFormatterShortStyle;
df.dateStyle = NSDateFormatterShortStyle;
df.locale = [NSLocale currentLocale];
[df setDateFormat:@"dd/MM/yyyy"];
NSString *todaysDate = @"31/12/2013";
NSDate* today = [df dateFromString:todaysDate];

NSLog(@"comparing todaysDate: %@ with today: %@",todaysDate,today);

When I check my console I see that todaysDate is 31/12/2013 and today is 2013-12-30 21:00:00 +0000 I do not understand why it goes 1 day into the past... can anyone help me out here? I'm trying to basically filter out some items in a dictionary based on date. Filtering part not included here as it was determined that the dateFromString is not doing its job.

Answer 1

It's very probably because of your TimeZone. You seems to be GMT+3 or something like that. If you change your local Time Zone things should be ok.

You should use : df.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0]: instead of localTimeZoneto always have the same results even in different time zones.

Answer 2

Add the below to your NSDateFormatter.

[df setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]];