Fork of the unix cal command (from https://packages.ubuntu.com/focal/bsdmainutils) that acts as an interactive date picker.

Getting started

sudo apt build-dep bsdmainutils
sudo apt install libncurses-dev
make

Now try it out:

./calpick -y > out

You should see a display similar to cal or ncal. Most commandline args continue to work. In addition you will be able to move the highlighted date using arrow keys. To select a date, hit enter. You'll exit the date picker and the date you picked will be in file out.

Known issues

Cursor can be moved out of the visible calendar.

There's no man page. man ncal should almost entirely be applicable.