You did not address this clap trap of non-design:

my $Map_Request_Date  = 'Jan  1 2017 12:00';
my $Map_Due_Date      = 'Jan 31 2017 12:00';
my $Map_Cutover_Date  = 'Feb 28 2017 23:59';
my $Map_Complete_Date = 'Mar  1 2017 12:01';
my $Map_Approved_Date = 'Dec 31 1999 0:01';

for my $Date_Ref ($Map_Request_Date, $Map_Due_Date, $Map_Cutover_Date,
                  $Map_Complete_Date, $Map_Approved_Date
) {
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And we still do not understand what the OP means by "issue do not know how to address an array of variable to place the data back into the array variable ..."