This is just a super quick update to inform anybody following that, yes, I am still alive and working on litCal. I’ve made some progress on filling out the API. At the moment, I’ve only really started on what I call the secular API, which relates to non-religious calendar functions.
I think the future direction that I plan on taking this is to create an ANSI C library that will act as a set of primitive calendar functions, such as basic computus and day of week calculations, and then use a C++ wrapper in a second library to provide a more integrated interface that has operator overloading, stores state (the date), produces output strings, etc..