I have an NSArray with 3 objects in it. Each object is made up of 5 values. How can I sort by Date with in the objects?

result: (
    gg,
    "2012-10-28 01:34:00 +0000",
    "Church Bells",
    "pin_red",
    1
)(
    iu,
    "2008-09-22 17:32:00 +0000",
    "Birthday Song",
    "pin_red",
    1
)(
    "my birthday woo hoo",
    "2012-09-04 19:27:00 +0000",
    "Birthday Song",
    "pin_blue",
    1
)

The results I am looking for - Sorted Array should look like this.

(
    iu,
    "2008-09-22 17:32:00 +0000",
    "Birthday Song",
    "pin_red",
    1
)
(
    "my birthday woo hoo",
    "2012-09-04 19:27:00 +0000",
    "Birthday Song",
    "pin_blue",
    1
)
(
    gg,
    "2012-10-28 01:34:00 +0000",
    "Church Bells",
    "pin_red",
    1
)

I am getting this array from my nsdictionary object.

dictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:stringsPlistPath];
stringsMutableArray = [[NSMutableArray alloc] initWithObjects:nil];

        for (id key in dictionary) 
        {
            [stringsMutableArray addObject:[dictionary objectForKey:key]];
        }