Those who accepted the new calendar started making fun of these people, played tricks on them and called them fools.
There is no consensus or certainty over where April Fools' Day originated from, leaving the day shrouded in mystery.
Gwyneth Stuckenschnieder, doesn't normally have any plans for April Fool's Day, but often hosts a large dinner for Easter.
As of the Wednesday before April Fools', brands had already launched a fake beer line, a study pillow and a salon that makes you look like your dog.
Some historians speculate that April Fools' Day dates back to 1582.
Other theories related to April Fool's Day were the Canterbury Tales, which tells the story of a cock that tricked a fox.
So, People who didn't follow the new calendar of Pope Gregory XIII, and continued to celebrate the New Year during the last week of March through April 1 were at the receiving end of jokes and pranks, a tradition that has continued.
This year, Easter falls on April Fools' Day for the first time since 1956, and on Thursday's episode of "Jimmy Kimmel Live!" he enlisted the help of former NASA engineer Mark Rober to demonstrate some hilarious ways for parents to prank their kids on Easter morning.
Every celebration has its own special day.
Another notable joke was carried out by fast-food giant Burger King with their "Left-Handed" Whopper, in 1998.