There are two problems. First, assignment is denoted by '=', not '=>', which is a glorified comma: 
$time{$previous} = {
                           'end_date' => $date,
                           'end_time' => $time
                            };

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Second, in the print statement, you need to dereferene the hash, not the key: 
print "$_ $time{$_}{start_date} <br> \n" for (sort keys %time);

[download]

-Mark

In reply to Re: Setting a hash element to a anoymous hash by kvale
in thread Setting a hash element to a anoymous hash by TASdvlper

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