There are two problems with the calendar (in addition the the common log problem, which, if it's using logging, should be solved by the fixed library):

- It depends on icalendar but icalendar is missing in calendar's dependency list, so you have to install icalendar yourself
- The icalendar package is empty.. just directories, no files. Packaging problem.

I suspect that the way to use info on tap is to prepare a flat-file database yourself (I think that's what the readme.txt file tried to explain), I had a go at it but got some error messsages so I clearly didn't understand it correctly. But this (preparing, installing and using a database for looking up stuff) is maybe the exact use-case our locksmith (the OP) had in mind?