PCAL is a multi-platform (Unix/Linux, DOS, DOS+DJGPP, Windows+Cygwin,
Amiga) program which generates annotated PostScript or HTML calendars
in a monthly or yearly format.

It is usually run from the command line but there is an HTML/CGI
capability as well, to generate calendars (in either PostScript or HTML
format) from a web-browser interface.

Configuration file examples are available in the
/usr/doc/pcal-4.11.0/examples/ directory.