On TikTok, people are gobsmacked after learning the true meaning behind the popular abbreviations AM and PM.

People have been left gobsmacked after learning the meaning behind AM and PM which many said they did not know, despite using the terms regularly for years in conversation ...

There are big questions about what causes the tick of time, and how we experience it. But it turns out people have more fundamental questions than that, such as "what does AM and PM actually mean?" ...