Sir Eoin O Fada wrote on Jul 11
th, 2026 at 3:14pm:
Bobby,
What do you find difficult in the concept that 12:00pm means 12 hours post meridiem or 12 hours after the noon.
I am fully aware that people accept things that are wrong for the sake of convenience or because they don’t think.
The fact that 12:00pm is commonly accepted as noon doesn’t alter the fact that pm means post meridiem and any time defined by it comes after noon.
Read it again:
Post meridian or PM is all about solar noon:
Solar noon is the exact moment the Sun reaches its highest point in the sky for a specific location,
occurring midway between sunrise and sunset.
At this instant, the Sun crosses your local north-south meridian, and any shadows cast point directly due north or due south.
Because of the Earth's tilted axis and elliptical orbit, clock noon (12:00 PM) rarely aligns perfectly with solar noon.Depending on the time of year and your specific longitude, solar noon can occur before or after clock noon by up to 15–30 minutes.Tracking the Sun in VictoriaFor residents in Victoria, Australia, the exact time of solar noon depends on the specific date and whether Daylight Saving Time is active.
During the winter months (Standard Time), solar noon typically occurs close to 12:30 PM to 12:45 PM depending on where you are in the state. During the summer, Daylight Saving Time shifts clocks forward, pushing solar noon closer to 1:30 PM to 1:45 PM.