Ignoring (because you've given us no hint of how you plan to translate "Nov" to 11), you can, of course, use a regex to separate a number like "11" into separate digits:

>perl -E "my $foo=11; if ($foo =~ /(\d{1})(\d{1})/) { say \"$1 \t $2\"
+;}"
1        1
[download]

Note that this is NOT a recommended approach since it doesn't deal with "1995" or with the ...say, second day of a month.