Who Invented AM and PM? The Origins of Timekeeping

Discover the origins of AM and PM and how ancient civilizations shaped our understanding of time.

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AM and PM were invented by ancient civilizations to divide the 24-hour day into two 12-hour periods. AM stands for Ante Meridiem (before midday) and PM stands for Post Meridiem (after midday). This system was developed to make it easier to distinguish between morning and evening times in daily schedules.

FAQs & Answers

  1. What does AM stand for? AM stands for Ante Meridiem, which means 'before midday' in Latin.
  2. What does PM stand for? PM stands for Post Meridiem, meaning 'after midday' in Latin.
  3. Why do we use AM and PM? AM and PM were developed to separate the 24-hour day into two 12-hour periods for easier time distinction.
  4. Where did the 12-hour clock system originate? The 12-hour clock system originated from ancient civilizations that sought a way to organize their daily activities.