dockerfile.run

tcal

program for calculating and printing calendars

Debian

RUN apt-get update && \
    apt-get install -y gcal

Ubuntu

RUN apt-get update && \
    apt-get install -y gcal

Kali Linux

RUN apt-get update && \
    apt-get install -y gcal

Fedora

RUN dnf install -y gcal

Raspbian

RUN apt-get update && \
    apt-get install -y gcal

click the source code to copy install tcal on any operating system with command-not-found.com