[ID 19991103.010] bug in Localtime

Dear reader, 

I found a problem using the function localtime. Executing the below script
will give me a wrong value for $mon (10 i.s.o. 11):

($sec,$min,$hour,$day,$mon,$year,$wday,$yday,$isdst) = localtime(time) ; 
printf "$year/$mon/$day\n"; 
printf "$hour:$min:$sec\n"; 
printf "$]\n"; 

output: 

99/10/3
12:12:2 
5.00503 

using the functions date and time (MSDOS box under Windows NT 4) 

Date: wo 03-11-1999 
time: 12:12:02,32 

Is this a bug in Perl ? 

perl -V gives you:

Summary of my perl5 (5.0 patchlevel 5 subversion 03) configuration:
  Platform:
    osname=MSWin32, osvers=4.0, archname=MSWin32-x86-object
    uname=''
    hint=recommended, useposix=true, d_sigaction=undef
    usethreads=undef useperlio=undef d_sfio=undef
  Compiler:
    cc='cl.exe', optimize='-O2 -MD -DNDEBUG -TP -GX', gccversion=
    cppflags='-DWIN32'
    ccflags ='-O2 -MD -DNDEBUG -TP -GX -DWIN32 -D_CONSOLE -DNO_STRICT
-DHAVE_DES_FCRYPT -DPERL_OBJECT'
    stdchar='char', d_stdstdio=define, usevfork=false
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=10
    alignbytes=8, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='link', ldflags ='-nologo -nodefaultlib -release -machine:x86'
    libpth="C:\Perl\lib\core" 
    libs= oldnames.lib kernel32.lib user32.lib gdi32.lib  winspool.lib
comdlg32.lib advapi32.lib shell32.lib ole32.lib  oleaut32.lib netapi32.lib
uuid.lib wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib
PerlCRT.lib
    libc=C:\Perl\lib\CORE\PerlCRT.lib, so=dll, useshrplib=yes,
libperl=perlcore.lib
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags='-dll -nologo -nodefaultlib -release
-machine:x86'


Characteristics of this binary (from libperl): 
  Locally applied patches:
  	ActivePerl Build 519
  Built under MSWin32
  Compiled at Aug 12 1999 09:50:30
  @INC:
    c:/Perl/lib
    c:/Perl/site/lib
    .
Rob Van den Broeck
New EDC BV 

e-mail: mailto:rbroeck@new-edc.nl
www :  http://www.new-edc.nl

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• [ID 19991103.010] bug in Localtime by Rob van den Broeck
• Re: [ID 19991103.010] bug in Localtime by Russ Allbery
• Report 19066 by H.Merijn Brand