Mapping global time zones
Chapter 1
The birth of global time
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Chapter 2
The zigzagging International Date Line
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Chapter 3
Extreme time zone anomalies
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Chapter 4
Living on the edge of time
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YOUR GOAL
Master of Mapping global time zones
Ch 1 · The birth of global time
Fun Fact
Missing a train: Sandford Fleming missed a train in Ireland in 1876 due to a misprinted PM/AM schedule, inspiring him to advocate for standard global 24-hour time.
Glossary
prime meridian (noun)
An imaginary line of longitude designated as zero degrees, from which other longitudes are measured. In 1884, delegates from twenty-six nations gathered in Washington, D.C., to select Greenwich as the official baseline.
An imaginary line of longitude designated as zero degrees, from which other longitudes are measured. In 1884, delegates from twenty-six nations gathered in Washington, D.C., to select Greenwich as the official baseline.
Quiz
Which engineer proposed the system of 24 global time zones after missing a train?
Quiz
In what year did international delegates establish Greenwich as the Prime Meridian?
Quiz
Which country abstained from the 1884 vote and kept using its own meridian for decades?