31 ms·My mnemonic is literally "it's the wrong one". 12PM is morning, 12AM is afternoon.by 1_player 6y agoMy mnemonic is literally "it's the wrong one". 12PM is morning, 12AM is afternoon.criddell 6y agoThis one works for me. Thanks!wizzwizz4 6y agoNo, it's not. 12PM is midday (12:00), and 12AM is midnight (00:00).1_player 6y agoRight. Mnemonic or not, I still get it wrong.