Q: Is a noon when the Sun transits the local celestial meridian? ¶
A: Yes, this is when the sun is at its highest altitude in the sky, at 12 noon apparent solar time.
Q: Is a noon derived from Latin nona hora? ¶
A: Yes, and the ninth hour of the day, and is related to the liturgical term none.
Q: Is a noon commonly indicated by 12 p.m., and midnight by 12 a.m? ¶
A: Yes, While some argue that such usage is "improper" based on the original Latin meanings , the usage of 12 p.m. to refer to noon is conventional.