What is 12 am or 12 pm?

Forums Moon Nasa announcement What is 12 am or 12 pm?

Peter Gudgeon

Having just checked that website it refers to “teleconference at 12 p.m. EDT Monday, Oct. 26”  ?

My understanding is that there is “12 o’clock midday” and “12 o’clock midnight”. Surely 12 p.m. would come 1 minute after 11:59 p.m. Similarly midday, coming 1 minute after 11:59 a.m. would either be 12 a.m. or even 0 p.m.

I believe that the NASA website is referring to their midday.