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How do you move a whole country to a new calendar?

When the Meiji government of Japan moved from the old Chinese lunar calendar to the Gregorian version in the 19th century, it was hard for the country鈥檚 citizens to know what time of day it was, explains historian Mark Ravina.

Photo: A visitor to Meiji Jingu Shinto Shrine (Nina Dermawan/Getty Images)

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55 seconds