NSCalendar

NSDate *fooDate = [NSDate date];

unsigned units = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit | NSWeekdayCalendarUnit;




NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];




NSDateComponents *components = [calendar components:units fromDate:fooDate];

 

[components year];

[components month];

[components day];

[components weekday];