That’s the point though. They are called noon/midday and midnight. There is no am/pm on the 12. It’s 11:59pm, midnight, 12:01am, and 11:59am, midday, 12:01pm. Really it’s not that confusing, it’s just two points in time in the whole day and it’s fairly easily to tell which of them you are at unless you are close to the poles.we’ve managed to cope this long with them.