Originally from ticket #12469.
I would like to observe moon phases as seen from any location in the first century AD, in order to help verify the Biblical lunar calendar.
a. What program version would do this with best results?
b. How would you quantify the time accuracy of your programs (e.g., ±8hrs/millenium)?
c. What time units are used in the program?
d. How are leap years and calendar discrepancies handled?