How to uninstall bbdate from Ubuntu
To uninstall just bbdate package itself from Ubuntu execute on terminal:
sudo apt-get remove bbdate
Uninstall bbdate and it's dependent packages
To uninstall the bbdate package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove bbdate
If you also want to delete configuration and/or data files of bbdate from Ubuntu then this will work:
sudo apt-get purge bbdate
To delete configuration and/or data files of bbdate and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge bbdate
bbdate package information
Date tool for the blackbox window manager
bbdate displays the date in a decorated window, simulating the look of the blackbox toolbar. Note that you don't actually need blackbox for this program to work, but it won't look as good in any other window manager.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.