Actually, your sum would be 16, and you forgot about All Souls' Day (Day of the Dead), so 17! Regarding non-substituted, I am surprised myself that I could read that Spanish sentence, but it appears to mean facultative national holidays that the province has not chosen to replace with a different holiday on another day.

I never heard of local holidays before, BTW. Though, another peculiarity is in Germany, where some holidays are valid only for Protestants or Catholics (leading to the sillyness of school going on with half the class present).

_{*Lunatic*, n.
One whose delusions are out of fashion.}