use POSIX; 
my $date = strftime("%d-%m-%Y", localtime); 
$date; 
open(OUTPUT_FILE, ">>/export/home/elsonba/zizo/$date.log");

my $date = strftime("%d-%m-%Y", localtime);  
open(OUTPUT_FILE, ">>/export/home/elsonba/zizo/$date.log");

my $date = strftime("%d-%m-%Y", localtime);  
$date; <-- not needed 
open(OUTPUT_FILE, ">>/export/home/elsonba/zizo/$date.log");

#!/usr/bin/perl 
 
use strict; 
use warnings; 
use POSIX 'strftime'; 
 
my $date_fmt = '%d-%m-%Y'; 
 
my $curr_date = strftime($date_fmt, localtime); 
my $file = '/some/path/to/your/logfile'; 
 
open LOGFILE, '>', "$file-$curr_date.log" or die $!; 
 
while (1) { 
  # do whatever your program needs to do, writing log data 
  # to LOGFILE 
 
  # Check the date at the end of each processing loop 
  my $this_date = strftime($date_fmt, localtime); 
  # If the date has changed... 
  if ($this_date eq $curr_date) { 
    # change the current date variable... 
    $curr_date = $this_date; 
    # close the existing logfile... 
    close LOGFILE; 
    # and open a new one 
    open LOGFILE, '>', "$file-$curr_date.log" or die $!; 
  } 
}