Speaking of calendars, there are two versions of BSD's calendar(1) on AUR.
One is based on an older version of bsdmainutils from upstream Debian but with plenty of patches and calendar files (https://aur.archlinux.org/packages/calendar/).
The other is a part of newer bsdmainutils from upstream Ubuntu (https://aur.archlinux.org/packages/bsdmainutils/ - also includes ncal).
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko