A.
April Fool's Day originated from the United States, and later it spread to every comer of today's world due to the great power of American economy influence.
B.
After the new calendar was introduced in France in l562, April Fool's Day was forgotten by most French people.
C.
April Fool's Day is not a French holiday any more when it became more and more like an international holiday.
D.
April Fool's Day comes from some citizens' insistence to celebrate the New Year on April 1st, which was not the day of the New Year any more.