kiya

In my ongoing goal of distracting myself from my catastrophic meltdown with painfully ludicrous levels of nerdery, I have been attempting to make sense of the Egyptian ritual calendar again. After acquiring sufficient beer to pad the landing, I am left wondering:

Does anyone know of software that can handle scheduling events in relationship to phases of the moon and other astronomical events? (In an ideal world, this would include the capacity to define and distinguish between twelve-lunar-month and thirteen-lunar-month years according to a ruleset.)

So, suggestions?