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1.
When was the Gregorian calendar--the calendar used by most of the Western world--first established?
2.
How many days are in a year according to the Islamic calendar?
3.
When does the Chinese year begin?
4.
Who established the first 365-day calendar?
5.
What emperor ordered the Romans to disregard the moon in calculating their calendars?
6.
When does the Hebrew calendar begin?
