I would guess, that if you start looking at date calculations, you would find that the 0 based method is more natural, and in fact there are a lot of (day-1) calculations in the code.
0 based lets you use modulo in calculations easily.
I would guess, that if you start looking at date calculations, you would find that the 0 based method is more natural, and in fact there are a lot of (day-1) calculations in the code.
0 based lets you use modulo in calculations easily.