Post YFW you see 12am/pm refer to noon/midnight : r/ISO8601

If PM means 'after noon', shouldn't 12:00 PM actually be 0:00 PM? It's not twelve hours after noon. - Quora

Is 12:00 PM and 00:00 AM the same (which is both midnight)? Similarly, is 12:00 AM and 00:00 PM the same (which is both noon aka midday)? - Quora

Is 12pm noon or midnight? - Quora

Is 12:00 PM and 00:00 AM the same (which is both midnight)? Similarly, is 12:00 AM and 00:00 PM the same (which is both noon aka midday)? - Quora

Midnight and Noon—When to Use A.M. and P.M.

If PM means 'after noon', shouldn't 12:00 PM actually be 0:00 PM? It's not twelve hours after noon. - Quora

Why do we call 12:00 'midnight' when it is already the next day? - Quora

If PM means 'after noon', shouldn't 12:00 PM actually be 0:00 PM? It's not twelve hours after noon. - Quora

Is 12:00 PM and 00:00 AM the same (which is both midnight)? Similarly, is 12:00 AM and 00:00 PM the same (which is both noon aka midday)? - Quora