ccal software package provides Colorised calendar utility, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ccal
ccal is installed in your system.
Make ensure the ccal package were installed using the commands given below,
$ sudo dpkg-query -l | grep ccal *
You will get with ccal package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Utilities |
| Package | ccal |
| Version | 4.0-3 |
| Description | Colorised calendar utility |
| Sub Section | Utils |