Time Zones Knowledge Quiz – Test the Details

This time zones knowledge quiz explains Greenwich Mean Time, the International Date Line, China's single time zone and why Nepal is 45 minutes off. Ten questions test the details.

Start Time Zones Knowledge Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Basics
Roughly how many degrees of longitude wide is a standard time zone?
History
Which place was chosen in 1884 as the Prime Meridian?
Records
Which country has the most time zones, counting its overseas territories?
Asia
How many official time zones does China use?
Asia
Nepal's time is offset from UTC by how much?
Date Line
What happens when you cross the International Date Line traveling west?
Railways
What spurred the creation of standard time zones in the 1800s?
Standards
What does UTC stand for?
Pacific
Which country moved across the Date Line in 2011, skipping December 30?
Russia
How many time zones does Russia span?

Explanations: answer key for all 10 questions

Q1: Roughly how many degrees of longitude wide is a standard time zone?
Answer: 15 degrees
Earth turns 360 degrees in 24 hours, or 15 degrees each hour, so each standard time zone covers about 15 degrees.
Q2: Which place was chosen in 1884 as the Prime Meridian?
Answer: Greenwich, England
The International Meridian Conference chose Greenwich, home of the Royal Observatory, as zero degrees longitude.
Q3: Which country has the most time zones, counting its overseas territories?
Answer: France
France spans 12 time zones thanks to territories such as French Polynesia, Réunion and Martinique.
Q4: How many official time zones does China use?
Answer: One
China uses Beijing Time nationwide, so in far western Xinjiang the sun can rise around 10 a.m. in winter.
Q5: Nepal's time is offset from UTC by how much?
Answer: 5 hours 45 minutes
Nepal chose a time based near Mount Everest's longitude. India uses a half-hour offset of 5 hours 30 minutes.
Q6: What happens when you cross the International Date Line traveling west?
Answer: You skip ahead one day
Traveling west across the line from the Americas toward Asia, the date jumps forward by one day.
Q7: What spurred the creation of standard time zones in the 1800s?
Answer: Railway timetables
Before standard time, each town kept local solar time. Railroads in the US and Canada adopted time zones in 1883.
Q8: What does UTC stand for?
Answer: Coordinated Universal Time
UTC is kept by atomic clocks. It replaced Greenwich Mean Time as the world's time standard for science and aviation.
Q9: Which country moved across the Date Line in 2011, skipping December 30?
Answer: Samoa
Samoa switched to be on the same day as Australia and New Zealand, its main trading partners.
Q10: How many time zones does Russia span?
Answer: Eleven
Russia stretches from Kaliningrad on the Baltic to Kamchatka on the Pacific, the most time zones in one connected country.

Time Zones Knowledge Quiz – Keeping the World on Time

Time zones let noon roughly match when the sun is highest in the sky. Before the 1880s, towns set clocks by local solar time, so a train trip could pass through dozens of local times. Railroads pushed for standard time, and in 1884 the world agreed on Greenwich as the starting point.

Today, borders follow politics more than longitude. Some countries use half-hour or 45-minute offsets, others ignore geography entirely, and many change clocks for daylight saving time. The International Date Line zigzags to keep island nations on the same day.

What This Quiz Teaches

Frequent travelers and geography fans can use this quiz to understand why clocks differ around the world.

Why time zones are about 15 degrees wide
Why Greenwich is the Prime Meridian
Which countries have the most and fewest zones
What happens at the Date Line
Why Nepal has a 45-minute offset

Did You Know?

Antarctica's research stations usually keep the time of their home country.
Kiribati moved the Date Line in 1995 so all its islands share one day.
Some time zones are 14 hours ahead of UTC.
The US uses six main time zones including Alaska and Hawaii.
Daylight saving time was first used widely during World War I.