Now is a simple interactive calendar viewer and editor. It runs in the terminal, with a curses-type interface, and presents a “month view” with event descriptions within each day.
It reads and writes in the iCal format, supports UTF-8, monochrome, 16, 256 or 16M colors. Colors and key bindings are customizable in the configuration file. Free software (GPLv3), witten in C, no build dependencies.