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    <p>This is <em>never</em> going to be appropriate:</p> <pre><code>NSString *old1 =[dateFormatter1 stringFromDate:old]; NSDate *new = [dateFormatter2 dateFromString:old1]; </code></pre> <p>You're saying, "Format a date using one formatter... and then parse it using a different one."</p> <p>You've already parsed the value which was in the old format. You now need to <em>format</em> it in the new formatter.</p> <p>I'm not an Objective-C developer, but I suspect you just want:</p> <pre><code>NSDate *date = [dateFormatter1 dateFromString:[_newlymadeArray objectAtIndex:i]]; NSString *string = [dateFormatter2 stringFromDate:date]; [_convertedBdates addObject:string]; </code></pre> <p>Note how there's only <em>one</em> date involved, but two strings (the original format and the new format).</p> <p>Also note that there's no need to create a new pair of formatters on each iteration of the loop. Create them <em>before</em> the loop and reuse them:</p> <pre><code>NSDateFormatter *oldFormatter = [[NSDateFormatter alloc] init]; [oldFormatter setDateFormat:@"MM/dd/yyyy"]; NSDateFormatter *newFormatter = [[NSDateFormatter alloc] init]; [newFormatter setDateFormat:@"dd/MM/yyyy"]; for (int i = 0; i &lt; _newlymadeArray.count; i++) { NSDate *date = [oldFormatter dateFromString:[_newlymadeArray objectAtIndex:i]]; NSString *string = [newFormatter stringFromDate:date]; [_convertedBdates addObject:string]; } </code></pre> <p>(You may <em>also</em> want to check whether <code>date</code> is null within the loop, to handle bad data, of course.)</p>
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    1. POissue in Changing date formate
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    1. CO`if (answer == Jon Skeet) {+1}` I didn't know that you work on `Objective-C` too.
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      1. USInder Kumar Rathore
    2. CO@InderKumarRathore: I don't. I've never written a line of code in it *except* on Stack Overflow.
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    3. COcan you tell me what i was doing wrong?
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