I grew up with 24-hour clocks, and I always get confused by the 12h version of midday and midnight. Literally, the mnemonic I use to remember which is which is

I grew up with 24-hour clocks, and I always get confused by the 12h version of midday and midnight. Literally, the mnemonic I use to remember which is which is "it's the one that doesn't make sense". So 11am then 12pm And 11pm then 12am (Whereas I would expect the 12th hour of the morning to follow the 11th of the morning, but it's actually the other way around)