Time Trivia Twists

General Knowledge · 10 questions

Untangle the little tricks of time zones, calendar rules and celestial cycles—and see whose side time is on in your friend group.

Answer each question first, then check with “Show the answer”. You can also play the same quiz in the Quizera app by searching for it in Explore, as a live game, a test or flashcards.

1. At the same moment, if it is 10:00 at UTC+2, what time is it at UTC−5?

   1. 05:00
   2. 03:00
   3. 17:00
   4. 15:00
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   B) 03:00

2. What celestial cycle runs from one new moon to the next?

   1. Synodic month
   2. Sidereal month
   3. Solar day
   4. Synodic year
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   A) Synodic month

3. Why is the year 1900 not a leap year in the Gregorian calendar?

   1. A century year not divisible by 400
   2. A year not divisible by 4
   3. A century year divisible by 400
   4. A year not divisible by 100
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   A) A century year not divisible by 400

4. On a sundial, the shortest shadow occurs near which point in the Sun’s daily path?

   1. Local solar midnight
   2. Sunset
   3. Local solar noon
   4. Sunrise
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   C) Local solar noon

5. Where the spring daylight-saving change is one hour, how do clocks change?

   1. No clock change
   2. Half-hour advance
   3. One-hour advance
   4. One-hour setback
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   C) One-hour advance

6. Leap seconds added to UTC aim to keep it close to which natural time measure?

   1. Time based on Earth’s rotation
   2. Time based on Earth’s orbit around the Sun
   3. Time based on the cesium-133 transition frequency
   4. Time based on the Moon’s orbit around Earth
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   A) Time based on Earth’s rotation

7. What does a conventional Unix timestamp count from its starting point?

   1. Minutes
   2. Seconds
   3. Hours
   4. Milliseconds
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   B) Seconds

8. How does Earth’s rotation period relative to distant stars compare with its rotation period relative to the Sun?

   1. Longer only in leap years
   2. The same length
   3. Longer
   4. Shorter
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   D) Shorter

9. What mainly moves the rotor that winds the mainspring in a self-winding mechanical wristwatch?

   1. Atmospheric pressure
   2. Wrist movement
   3. Electric current
   4. Sunlight
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   B) Wrist movement

10. Which ocean does the International Date Line pass through for most of its length?

    1. Atlantic Ocean
    2. Arctic Ocean
    3. Indian Ocean
    4. Pacific Ocean
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    D) Pacific Ocean