TZ DATE

NSString *dateString = @"2011-12-29T09:09:06-0500";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];

NSDate *dateFromString = [dateFormatter dateFromString:dateString];    
[dateFormatter release];
NSLog(@" dateFromString %@",dateFromString);