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Science · Facts & stats

24/7 facts & stats

7 fact-checked facts about the 24-hour day and 7-day week, each with the reason behind it. 5 more are in today's round and join this page after it closes.

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The basics

How many hours are in one week?

Answer168

7 days times 24 hours equals 168 hours.

How many minutes are in one day?

Answer1,440

24 hours times 60 minutes equals 1,440 minutes.

Going deeper

What does 'a.m.' stand for?

AnswerAnte meridiem (before midday)

A.m. is Latin ante meridiem, before midday; p.m. is post meridiem, after midday.

Saturday is named after which planet?

AnswerSaturn

Saturday comes from Saturn's day, from the Roman name for the planet and god.

Which ancient civilization's base-60 number system gave us 60 minutes in an hour?

AnswerThe Babylonians

Babylonian astronomers counted in base 60, a system that survives in minutes, seconds and degrees.

Expert level

Thursday is named after which Norse god?

AnswerThor

Thursday is Thor's day; Wednesday comes from Woden, another name for Odin.

Which part of the brain acts as the body's master circadian clock?

AnswerSuprachiasmatic nucleus

The suprachiasmatic nucleus in the hypothalamus uses light signals from the eyes to keep daily rhythms in sync.

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