What does AM and PM stand for?

Most of us use the terms "AM" and "PM" every day without a second thought, but have you ever stopped to ask what they stand for?

These two letters are actually an abbreviation for Ante Meridiem and Post Meridiem respectively. AM simply means before noon, while PM follows after; it's Latin for ‘after midday.’ So now the next time someone asks you "What does AM and PM mean?" You can confidently reply with: "It's ancient Latin for 'before noontime' and 'after noontime,'" sure to impress anyone in earshot!