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copied!<p>To be honest I thought this was a poor question until I read the last line. "I want the locale to only affect the order of the month, day and year. Can this be done?"</p> <p>A fixed date format such as <code>[formatter setDateFormat:@"HH:mm"]</code> will not be affected by locale changes. The best thing to do is to use a '<code>NSDateFormatterStyle</code>' to do the heavy lifting for you.</p> <p>Part of your problem was that you did not set the correct date formatter style. <code>NSDateFormatterShortStyle</code> already outputs the date format you want.</p> <p>As far as the time format goes, if the user has their system set to 24hour clock then <code>NSTimeZoneNameStyleShortGeneric</code> should work right out of the box. But if not that can be fixed. The beauty of it is you don't have to check.</p> <pre><code>// Example Date Now NSDate *now = [NSDate date]; // Formatter set to proper locale by default NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; // Set formatter to short styles [formatter setDateStyle:NSDateFormatterShortStyle]; [formatter setTimeStyle:NSTimeZoneNameStyleShortGeneric]; </code></pre> <p>At this point your formatter will have already setup it's own format string "<code>M/d/yy h:mm:ss a</code>", this would be for the US. So at this point all we have to do is change the format slightly.</p> <pre><code>// Remove the AM/PM from the format string formatter.dateFormat = [formatter.dateFormat stringByReplacingOccurrencesOfString:@"a" withString:@""]; // Change 12h clock to 24h clock formatter.dateFormat = [formatter.dateFormat stringByReplacingOccurrencesOfString:@"h" withString:@"H"]; </code></pre> <p>Now your date format should be "<code>M/d/yy H:mm:ss</code>". Which is the version you would want for the US. You can confirm with a log statement.</p> <pre><code>NSLog(@"%@",[formatter stringFromDate:now]); </code></pre> <p>Note that when you change the '<code>h</code>' in the format to '<code>H</code>' you don't care where it is. So if in some locale they were to have a reversed time format it would be changed, but left in it's original position.</p>

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