sophisticated calendar and alarm program - rem2ps, 2pdf, 2html tools

 Remind allows you to remind yourself of upcoming events and
 appointments. Each reminder or alarm can consist of a message sent
 to standard output, or a program to be executed.
 .
 It also features: sophisticated date calculation, moon phases,
 sunrise/sunset, Hebrew calendar, alarms, PostScript output, tcl/tk
 front-end and proper handling of holidays.
 .
 Tools to convert the remind output to ps, pdf or html as well as example
 files.