I cannot reproduce that error.

Code used:

use strict;
use warnings;
use POSIX qw(strftime); 
my $datestring = strftime "%B %d %Y", localtime;
print("date  - $datestring\n");
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Output

date  - September 16 2014
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Perl version

This is perl 5, version 16, subversion 3 (v5.16.3) built for MSWin32-x
+64-multi-t
hread

Copyright 1987-2012, Larry Wall

Perl may be copied only under the terms of either the Artistic License
+ or the
GNU General Public License, which may be found in the Perl 5 source ki
+t.

Complete documentation for Perl, including FAQ lists, should be found 
+on
this system using "man perl" or "perldoc perl".  If you have access to
+ the
Internet, point your browser at http://www.perl.org/, the Perl Home Pa
+ge.
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