I can tell you why: Merz just wants to get on the news cycle with something popular. If you’re not going to do it either way there’s no point in secrecy.

That’s an odd recommendation in my book. I use both and I couldn’t imagine using one instead of the other. To me, one is a route planner and the other is athletes’ Facebook.

I can never remember it properly either but when someone reminds me (thanks samus12345) which way around it is it does kind of make sense.

If you think of 12:00 as literally an infinitesimal slice of time it’s not really possible to give it an am/pm distinction, as it is literally the devider between the two. BUT, in a more real-life approach 12:00 is probably not an infinitesimal slice of time but the minute after a digital clock flipped to 12:00. That can be 12:00:00.00004 or 12:00:30 or 12:00:59.999944. And all those are indisputably pm.

Hour. Just a weird way to say 12:00 and 15:00 or 3pm and whatever 12:00 is in am/pm talk