When is a free and command line based, open source and extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic.
When will allow you to keep track of things you need to do on particular dates.
Here are some key features of "When":
· It's a very short and simple program, so you can easily tinker with it yourself.
· It doesn't depend on any libraries, so it's easy to install. You should be able to install it on any system where Perl is available, even if you don't have privileges for installing libraries.
· Its file format is a simple text file, which you can edit in your favorite editor.