According to repology.org and then OpenSuSe Build Service this package had latest version public of 0.4.1.
The upstream repository is at GitHub - https://github.com/elementary/calendar .
In the Ubuntu is it available from “elementary OS team” daily PPA.
So we need to get and install one dependency first:
sudo apt-get install ./libhandy-1-0_1.0.0-2_amd64.deb
and then use PPA:
sudo add-apt-repository ppa:elementary-os/daily
sudo apt-get update
sudo apt-get install maya-calendar
Then run it from menu or from terminal by
Note: visually this application looks very similar to the default GNOME Calendar application, I'm not sure about functionality differences.