NSDateFormatter is giving one day ahead date

Question

I am using below code, but it gives me one day ahead date .

Example: passing input string as "2013-08-31T23:59:59-0400" and out put date is coming as "2013-09-01 03:59:59 +0000".

NSDateFormatter *formatter = [self railsDateFormatter];
NSDate *date = [formatter dateFromString:dateString];

+(NSDateFormatter*)railsDateFormatter
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"YYYY-MM-dd'T'HH:mm:ssZ"];
    NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
    [formatter setLocale:locale];
    return formatter;
}

Thank you .

You don't seem to be 1 day ahead, more like 4 hours ahead. How is the date formatted when you output it? — David Rönnqvist, Jan 30 '14 at 11:59
The clue was the timezone offset at the end of the string, first has `-0400` (4 hours behind) and the second has `+0000` (0 hours behind). You have set the local to `en_US_POSIX` and this changed your timezone. No issue here at all — Simon McLoughlin, Jan 30 '14 at 13:07
If you don't know the difference between YYYY and yyyy, you should use yyyy. But that would only break dates near January 1st. — Greg Parker, Jan 30 '14 at 19:51

score 6 · Answer 1 · edited Jan 30 '14 at 12:02

hi these is happen because of the time zone difference please set time zone proper

-(NSDate *)convertDateFromString:(NSString *)strDate DateFormat:(NSString *)strDateFromat
{
    strDateFromat=@"yyyy-MM-dd'T'HH:mm:ss";

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    //chirag::In date day is displayed one less so it can print exact date
    formatter.timeZone = [NSTimeZone timeZoneWithAbbreviation: @"GMT"];
    [formatter setDateFormat:strDateFromat];

    NSDate *currentYearDate = [formatter dateFromString:strDate];

    return currentYearDate;
}

score 3 · Answer 2 · answered Jan 30 '14 at 12:00

3

Thats probably related to TimeZone issues - is the date your getting in UTC or your local time? Set the timezone of the dateFormatter accordingly

answered Jan 30 '14 at 12:00

rist

578
2
9

This not correct. The input string contains an *explicit time zone* "-0400" that corresponds to the "Z" format, therefore `setTimeZone:` has no effect on the string to date conversion. – Martin R Jan 30 '14 at 12:14
ah - ok the parsing would be correct without passing the timezone, but he seems to output the date again in the original timezone - therefore he has to set the timezone for outputtin – rist Jan 30 '14 at 12:58

score 3 · Answer 3 · answered Jan 30 '14 at 12:02

3

Its a timezone issue. Set the TimeZone of your DateFormatter Object.

[dateFormatter setTimeZone: [NSTimeZone timeZoneWithAbbreviation: @"GMT"]];

answered Jan 30 '14 at 12:02

Sahil Mahajan

3,922
2
29
43

This not correct. The input string contains an *explicit time zone* "-0400" that corresponds to the "Z" format, therefore `setTimeZone:` has no effect on the string to date conversion. – Martin R Jan 30 '14 at 12:14

NSDateFormatter is giving one day ahead date

3 Answers3