Install debdate by entering the following commands in the terminal:
sudo apt update sudo apt install debdate
Description:
Convert Gregorian dates to Debian Regnal dates
Displays the Debian Regnal date of a given date, where the years are named after the current stable release.
Homepage: http://git.trueelena.org/cgit.cgi/software/debdate/about/
Version: 0.20170714-1
Section: universe/utils