12 noon is 12 pm or am???

Midnight to midday is AM. Midday is PM to the next midnight.
We Brits invented it largely so our sailors knew what time it was and where they were going. (It was vital in navigation.)

It is all about the sun being over the yard arm. Well the Greenwich meridian.

Before midday it is "ante" (before) meridian (midday)
P M is "post" meridian after midday.
Greenwich is the international time standard the world uses.

I'd say PM, too, as it's the start of the afternoon.

Same if you are up at say 4am, are you up late or up early? (smile) (no emiticons)

Midday is pm midnight is am

12:00 HRS is noon, 00:00hrs is midnight

Luckygirl, does your DH's watch have the ability to change to 24 hour clock? I ask because I've just changed the car clock for my husband who has never managed the 24 hour clock.

Pm. It changes to am at midnight.

pm

Found this explanation, which is even more confusing

"Another convention sometimes used is that, since 12 noon is by definition neither ante meridiem (before noon) nor post meridiem (after noon), then 12 a.m. refers to midnight at the start of the specified day (00:00) and 12 p.m. to midnight at the end of that day (24:00)."

PM

Got to be PM.

Definitely PM I agree with Charleygirl

PM!

Yes pm

Midday-pm.

To me midnight is 12am so midday would be pm.

Nether its just noon IMHO
However 1 minute before is am
One minute ( or second if you so wish) after is pm
Could DH programme his clock just before or just after 12 noon

12 pm.