Answer :
Final answer:
The National Convention changed the calendar of France to make each week 10 days long.
Explanation:
The subject of this question is History. The question is asking about the changes made to the calendar of France by the National Convention in their attempt to create a new, secular order. The answer to the question is 10 days long.
Learn more about changes in the calendar of France here:
https://brainly.com/question/17524242