Quiz · Time, Calendars & Measurements
Why does February have 28 days, July carry Julius Caesar's name and a leap year come every four years? Discover the surprising history of the calendars we live by, from ancient Rome to the Chinese zodiac.
Time zones around the world, the history of our calendar, and the units we use to measure everything.
Before you start
You have 15 seconds for each question. When time runs out, the question counts as wrong.
Your first choice is the one that counts. It is checked straight away, with an explanation where there is one.
At the end you see your score and can go back through every question and its answer.
XP scales with your score. Replays earn XP only when you beat your previous best.
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General Knowledge · Time, Calendars & Measurements
When it's noon in London, what time is it in Tokyo, New York or Sydney? Explore time zones, Greenwich Mean Time, daylight saving and the International Date Line, plus a few countries that do time their own way.