Why was the problem of devising a workable yearly calendar so difficult on Earth?
A) the Earth's rotation period does not divide evenly into the Earth's period of revolution
B) The day is based on what the Sun does, but the year is based on what the Moon does
C) The length of the Earth's year varies from year to year
D) The calendar only works at Greenwich, England, and it gets further and further off as you move eastward in longitude
E) Various Popes of the Catholic Church disagreed about how long the day should be

Question

Quizplus · Accepted Answer

The problem of devising a workable yearly calendar was difficult on Earth because the Earth's rotation period does not divide evenly into the Earth's period of revolution, which makes it difficult to divide time into equal parts. This is why different calendars have been used throughout history and why there have been reforms and adjustments to the calendar over time.

Why Was the Problem of Devising a Workable Yearly Calendar