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POTime zone issue when retrieving an NSDate from Core Data
 

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  1. POTime zone issue when retrieving an NSDate from Core Data
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    <p>I am using this method to convert a month and year to a date which equals the last day in the month of the year given.</p> <pre><code>+ (NSDate*)endOfMonthDateForMonth:(int)month year:(int)year { NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDateComponents *comps = [[NSDateComponents alloc] init]; comps.year = year; comps.month = month; NSDate *monthYearDate = [calendar dateFromComponents:comps]; // daysRange.length will contain the number of the last day of the endMonth: NSRange daysRange = [calendar rangeOfUnit:NSDayCalendarUnit inUnit:NSMonthCalendarUnit forDate:monthYearDate]; comps.day = daysRange.length; comps.hour = 0; comps.minute = 0; comps.second = 0; [comps setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; [calendar setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; [calendar setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]]; NSDate *endDate = [calendar dateFromComponents:comps]; return endDate; } </code></pre> <p>I want the date to have a time component of 00:00:00, thats why I have set the time zone to GMT 0 and the date components for minutes, hours and seconds to 0. The date returned from the method is correct and has a time component from 00:00:00.</p> <p>This is how I save the date to Core Data:</p> <pre><code>NSDate *endDate = [IBEstPeriod endOfMonthDateForMonth:endMonth year:endCalYear]; [annualPeriod setEndDate:endDate]; </code></pre> <p>After retrieving the data and NSLogging it to the debugger console, I get dates like <code>2008-12-30 23:00:00 +0000</code> with a time component != 0. </p> <p>Why did the component change now? Shouldn't it stay at 00:00:00? </p> <p>What did I code wrong here? </p> <p>Thank you!!</p>
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