Prática de Shadowing: Why Do We Call It AM and PM? The Surprisingly Ancient Reason [ID0801] - Aprenda a falar inglês com o YouTube

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If you've spent your entire life checking the time,
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If you've spent your entire life checking the time,
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setting alarms, or arranging schedules,
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then you've probably come across something so normal that you never even questioned it.
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The labels AM and PM.
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They're printed on clocks, digital displays,
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airline tickets, calendars, and phones.
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So familiar that we rarely stop to think about what they actually mean.
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But behind these two simple abbreviations lies a long history of astronomy,
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ancient civilizations, Roman influence,
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and the way humans have always tried to bring order to something as wild and unstoppable as time itself.
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Today, we're diving deep into why we call the first half of the day AM,
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the second half PM, and why the world still uses this system,
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even when there's an alternative 24-hour clock available.
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Let's explore right here on History of Simple Things.
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To understand AM and PM,
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you need to go all the way back to the civilizations that lived and died under the movement of the sun.
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For thousands of years, humans used sunlight as their primary reference for time,
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when the sun rose, when it was at its highest point,
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and when it set.
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The midpoint of the day,
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when the sun is directly overhead,
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was incredibly important for navigation,
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rituals, farming, and even survival.
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Ancient Egyptians used sundials thousands of years ago,
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dividing daylight into 12 hours based purely on the movement of shadows.
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But it wasn't until the ancient Romans
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that the idea of naming the periods before and after the sun's highest point became more formal and linguistic.
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They used Latin not just for religion or literature, but for daily life.
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So naturally, timekeeping terminology evolved in Latin as well.
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This brings us to the actual words.
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AM stands for ante meridiem,
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which literally means before midday or before the meridian,
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with meridium referring to the sun's position at its apex.
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Meanwhile, PM stands for post-meridium, meaning after midday.
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The concept is simple.
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The 12-hour cycle resets every time the sun reaches that midpoint.
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From midnight until just before noon,
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everything is considered ante meridium,
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leading up to the sun's highest point.
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And from noon until just before the next midnight, everything is post meridium.
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What's interesting is
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that these terms refer specifically to the sun's position relative to an imaginary line in the sky called the meridian,
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essentially a vertical arc running from the north pole to the south pole across your location.
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At solar noon, the sun crosses this meridian,
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marking that exact midpoint of the day.
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So a.m and p.m are literally describing the sun's cosmic travel schedule.
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Now here's something that confuses almost everyone at some point.
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Why is 12 p.m actually noon and 12 a.m actually midnight?
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Shouldn't noon be neither before nor after midday?
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You're right.
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By strict definition, noon is neither a.m nor p.m.
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Same with midnight.
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But because the timekeeping system needed labels for schedules,
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clocks, and communication, we applied the terms anyway.
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Historically, there were attempts to fix this.
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Some clocks used the word noon and midnight instead of a.m p.m.
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Some old railways labeled midnight as zero o'clock and noon as 12m.
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But eventually, by widespread convention,
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not by logic, 12 p.m became noon simply
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because it's easier to treat the numbers increasing after 12 o'clock as entering the post-midday cycle.
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Midnight got stuck with 12 a.m because it begins the before-midday hours.
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It's not mathematically elegant, but it's how the world standardized it.
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As you might expect, the 12-hour AM-PM format isn't universal.
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A large portion of the world uses the 24-hour clock,
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also known as military time.
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In that format, the day runs from 0 o'clock to 23.59 without resetting halfway way.
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Midnight is zero o'clock.
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Noon is 12 o'clock.
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And instead of saying 8 PM,
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you simply say 20 o'clock.
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It's logical.
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It reduces confusion.
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And it's used heavily in Europe,
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Asia, science, aviation, and medicine.
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So why does the United States,
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Canada, the Philippines, and several other countries still popularly use AM and PM?
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A lot of it comes down to cultural habit,
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historical practice, and the fact that analog clocks,
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which dominated for centuries, were designed around 12-hour cycles.
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The 12-hour format is also easy to read quickly and matches ancient human rhythms tied to daylight and night cycles.
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Even though digital systems allow for 24-hour displays,
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many cultures simply felt no need to change.
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However, the Latin term stuck because English,
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unlike some other languages, borrowed heavily from Latin in its early scientific,
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religious, and academic development.
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Timekeeping was something the Church and astronomers dealt with extensively,
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and both depended on Latin terms.
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So by the time English clocks and schedules became standardized,
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AM and PM were already the accepted scholarly way of referring to the two halves of the day.
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And because English-speaking nations spread their influence globally through trade,
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colonization, and technology, the system went with them.
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The result is that even in countries that now use the 24-hour clock,
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you can still find AM and PM in old documents,
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historic buildings, and traditional literature.
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In the big picture, AM and PM aren't just labels on your alarm clock.
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They're snapshots of history, history,
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echoes of ancient astronomers, Roman scholars,
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sundial makers, church timekeepers, and early scientists who shaped how the modern world understands time.
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The next time you set an early morning alarm or schedule a late-night meeting,
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remember, you're using a system older than most languages,
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older than modern nations, and older than the technology that now depends on it.
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And that system continues to work centuries later because of two simple Latin phrases,
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ante meridium and post meridium.
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If you enjoyed this video,
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please check out our other bingeable channels.

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Contexto & Background

O vídeo "Por que chamamos de AM e PM? A surpreendente razão antiga" explora a origem das abreviações AM (antes do meio-dia) e PM (depois do meio-dia). O apresentador discute como antigas civilizações, como os egípcios e romanos, criaram um sistema de medição do tempo baseado na movimentação do sol. Essa prática reflete a necessidade humana de organizar e entender o tempo, um conceito que sempre foi desafiador devido à sua natureza incessante.

Top 5 Phrases for Daily Communication

  • AM: Ante meridiem - "Antes do meio-dia".
  • PM: Post meridiem - "Depois do meio-dia".
  • Navegação: A importância do sol para a orientação e sobrevivência.
  • Civilizações antigas: Uso de equipamentos como o relógio de sol.
  • Meridiano: A linha imaginária que marca a posição do sol no céu.

Guia Passo a Passo para Shadowing

Para quem deseja usar a técnica de shadow speech e melhorar suas habilidades em prática de conversação em inglês, aqui está um guia prático baseado neste vídeo:

  1. Assistir o vídeo: Comece assistindo ao vídeo sem legendas, apenas para captar a pronúncia e o ritmo natural da fala.
  2. Escutar atentamente: Ouça o vídeo uma segunda vez, prestando atenção a como as palavras e frases estão estruturadas. Tente identificar as partes em inglês que você reconhece.
  3. Repetir em voz alta: Use a técnica de shadowspeak. Pause o vídeo e repita cada frase imediatamente após ouvi-la. Isso ajudará na sua pronúncia e fluência.
  4. Praticar com as frases-chave: Focalize nas cinco frases listadas anteriormente. Elas são úteis em contextos diários e ajudam a introduzir o vocabulário relacionado ao tempo.
  5. Criar um diário de aprendizado: Anote novas palavras e expressões que você aprender durante a prática. Considere usar o conteúdo do vídeo para praticar conversação sobre temas de tempo e astronomia.

Com essa abordagem, você não apenas melhora sua compreensão auditiva, mas também aprimora sua habilidade de falar em inglês, tornando a experiência de aprender inglês com YouTube mais eficiente e engajante.

O que é a Técnica de Shadowing?

Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.

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