Calendar: Difference between revisions

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=={{header|Perl}}==
This will call to the external program, cal.
<lang perl>$_=$ARGV[0]//1969;`\143\141\154 $_ >&2`</lang>▼
 
▲<lang perl>$_=$ARGV[0]//1969;`\143\141\154cal $_ >&2`</lang>
 
=={{header|PicoLisp}}==
Retrieved from "https://rosettacode.org/wiki/Calendar"