April Fools’ Day

1 April · a day of pranks, hoaxes and false stories, with no known single origin
Not an Islamic festivalFolk custom built on telling people false things

April Fools’ Day, on 1 April, is a day on which people in many countries play tricks on each other, send each other on fool’s errands and publish false stories in the media. It is not a religious festival. Its heart is saying something untrue so that someone believes it, and for Muslims that is the issue: lying is forbidden, and the Prophet, peace and blessings be upon him, warned against lying even to make people laugh. This page sets out what is known about where the day came from, which popular stories about it are true, legendary, disputed or false, what the Quran and Sunnah say, how scholars have ruled, and where other monotheists stand. Every claim is sourced. The origin of the day is not known, and we say so where historians disagree, including on stories that people on every side repeat.

What it is
April Fools’ Day, also called All Fools’ Day, is kept on 1 April. Wikipedia describes it as a day on which people play practical jokes and hoaxes on each other, with the prank in the UK sometimes revealed by shouting “April fool!” at the person fooled, who becomes the “April fool”. It is kept in many countries under local names and with local customs. Wikipedia says that newspapers and other media in several countries publish a false story on the day, and that in the UK, and in countries whose traditions come from the UK, pranks are supposed to stop at noon. The Library of Congress folklorist Stephen Winick writes of its origin: “Nobody knows for sure.” This page covers the history, the myths, the figures behind the day, and the Islamic position.
Sources: Wikipedia: April Fools’ Day · Library of Congress, Folklife Today: April Fools: The Roots of an International Tradition (Stephen Winick, 2016)
The history, step by step

Each step carries a tag. “Documented” means a reliable source states it. “Partly true”, “Disputed” or “Legend” means the evidence is mixed, late or thin, or that historians do not accept the story as history.

1. The origin is not known

Stated by the sources
Documented

Wikipedia says the origin of April Fools’ Day is not exactly known. Winick of the Library of Congress says: “Nobody knows for sure.” He adds that people have long guessed at Roman Saturnalia, Druidic rites in Britain, the medieval Feast of Fools and even the Indian festival of Holi, but that “clear references to a tradition of fooling in April don’t begin until the late Middle Ages.”

This matters for everything below. Every popular story of how the day began is either a guess, a legend or a hoax, and we label each one.

Accuracy note
We state the unknown as unknown. The ruling of Islam on April Fools’ Day does not depend on any of these stories (see the Islamic position).

2. The first sure reference: Bruges, 1561

1561
Documented

The Museum of Hoaxes, run by Alex Boese, says the earliest unambiguous reference we know is a poem by the Flemish poet Eduard de Dene of Bruges, in his handwritten Testament Rhetoricael, page 358. Its title, Refereyn vp verzendekens dach / Twelck den eersten April te zyne plach, means roughly “Refrain on fool’s errand-day, which is the first of April.” In the poem a nobleman sends his servant back and forth on absurd errands, supposedly to prepare for a wedding feast. In Belgium 1 April is still called Verzenderkensdag.

Winick also names this poem as the first certain reference. The Museum of Hoaxes adds that because de Dene assumes his readers already know the day, the custom is probably older, “But exactly how much older, we don’t know.”

Accuracy note
The date of the poem is 1561 in the Library of Congress, the Museum of Hoaxes and Wikipedia. Some online lists give 1539 for a Flemish poem. We could not find that date in any of these sources, so we do not use it.

3. Chaucer, about 1390 to 1392

Late fourteenth century
Disputed

In the Nun’s Priest’s Tale the fox tricks the rooster “Syn March bigan, thritty dayes and two,” which reads as 32 days after March began, that is 1 April. Winick calls it possibly “a glimpse” of the day and an early, clear reference to the date, but adds that many scholars think “bigan” is a scribal error and that the intended date was 2 May. Wikipedia explains why: the same passage puts the sun twenty degrees and one into Taurus, which fits early May and not 1 April.

The Museum of Hoaxes goes further and says the evidence suggests Chaucer had no knowledge of April Fools’ Day and probably did not set the tale on 1 April.

Accuracy note
We call this Disputed. A date in a manuscript that many scholars think is a copying error cannot carry the claim that the day was known in 1392.

4. “Poisson d’avril” in French poems, 1466 and 1508

Fifteenth and sixteenth centuries
Disputed

The French name for an April fool is poisson d’avril, “April fish.” The phrase appears in the poet Pierre Michault’s work in 1466 and in Eloy d’Amerval’s Le livre de la deablerie in 1508. Wikipedia says d’Amerval’s line is “possibly” the first reference to the celebration in France. Winick says that from the context we cannot be sure whether the author meant 1 April or fools in general.

The Museum of Hoaxes reports that etymologists believe the phrase first meant a go-between or messenger in a love affair, and that it only took on its April Fools’ meaning in the late seventeenth century. The paper fish stuck on a person’s back and the chocolate fish in French bakeries are later customs of the same name.

Accuracy note
We cannot tell whether these poems refer to the day, so we do not count them as evidence for it.

5. The calendar-change theory: the Edict of Roussillon, 1564

A popular theory
Disputed

The most repeated explanation is that the day began when France moved the start of the year from late March to 1 January, and that people who kept the old date were mocked with false gifts and invitations. Charles Panati gives this account. It is tied to a real law: Wikipedia says King Charles IX issued the Edict of Roussillon, promulgated on 9 August 1564 and applied from 1 January 1567, and that its Article 39 made 1 January the start of the year. The year had begun on different dates in different regions, among them Christmas, 25 March, 1 March and Easter.

Winick calls Panati’s version “interesting speculation” and notes that French books printed as early as 1507 already show years starting on 1 January. The poem of 1561 is older than the edict. Wikipedia also says April Fools’ Day was established in Britain before 1 January became the start of the year there.

Accuracy note
The edict is real, and the story that it started April Fools’ Day is a theory with no direct evidence behind it. We call it Disputed, and it is not the same story as the next card.

6. The 1582 Gregorian calendar version

A popular theory
Legend

A second version, which Winick cites from Jack Santino, says the change came with the switch from the Julian to the Gregorian calendar, which France adopted in 1582, and that those who kept the old date were fooled. Winick treats the calendar-change story, in its various forms, as a “migratory legend” and as “metafolklore”, which is a folk story about the origin of a folk holiday. The same tale is told about other holidays in other places. He adds that this does not necessarily mean it is untrue, but that it “often means not all variants can be true simultaneously.”

Accuracy note
The 1564 edict and the 1582 reform are two separate events in two separate stories. We mark this one Legend, because Winick treats it as a variant of the same migratory tale as card 5, with a different date.

7. Loose parallels: Hilaria, Holi and Sizdah Bedar

Ancient and medieval festivals
Disputed

Writers have compared the day to spring festivals of fooling. The Roman Hilaria was held at the March equinox and, per Wikipedia, honored a pagan goddess on 25 March, and it allowed games, masquerades and imitation of anyone. Winick notes that in Roman terms 25 March was “the eighth of the Calends of April”, which links the festival with 1 April, but says “there’s no hard evidence to connect Hilaria with April Fools’ Day, so this is just one of many guesses.” Wikipedia reports that in Punjab Holi has been associated with making fools of others, and the Library of Congress lists Holi only as a guess. In Iran, Wikipedia says dorugh-e Sizdah, the “lie of Thirteen”, is celebrated as part of Sizdah Bedar, the 13th of Farvardin, which usually falls around 1 or 2 April.

Of Sizdah Bedar, Wikipedia says there is no direct mention of such a celebration in history books before the Qajar era, and that pranks have “reportedly” been played on that day since 536 BC. We treat the 536 BC date as a report, not as a fact.

Accuracy note
These are parallels in kind, in the way that many cultures have a day of license and mockery. None is shown to be the source. We mention them as history only, and we do not take part in or praise any of them.

8. The first English references

1659 to 1796
Documented

The Museum of Hoaxes cites Francis Osborne in 1659, who mentions “impertinent errands, as the Dutch youth do” on the second of April, and John Aubrey in 1686, who writes of “Fooles holy day. We observe it on ye first of April. And so it is kept in Germany everywhere.” Both treat it as a foreign custom. The Library of Congress adds Poor Robin’s Almanac of 1760, which says of the day “Nor I nor they themselves do know” why it is kept, a diary entry written in Boston in 1771 by Anna Green Winslow, and a Connecticut handbill of 1796.

Accuracy note
Wikipedia dates the first British reference to Aubrey in 1686. These sources agree that in the seventeenth century English writers thought the day came from the Netherlands or Germany.

9. The lions at the Tower of London, 1698

1 April 1698
Documented

Wikipedia reports that on 1 April 1698 several people were tricked into going to the Tower of London to “see the Lions washed.” An 1857 ticket for “Washing the Lions” exists for an event that never took place.

Accuracy note
Some Muslim articles give this story with different details, including a different name for the source, and we could not confirm those details. We use what Wikipedia reports.

10. Hunt the gowk and tailie day, Scotland

Scots tradition
Documented

In Scotland the day is “Huntigowk Day”. A gowk is the Scots word for a cuckoo and for a fool. Wikipedia describes the custom of sending someone with a sealed message that reads “Dinna laugh, dinna smile. Hunt the gowk another mile,” and the person who reads it says they can only help if they first contact someone else, and sends the victim on with an identical message. The following day is “tailie day”, when paper tails are fixed to people’s backs, often with an unflattering message. In Ireland the equivalent is the “important letter” and the phrase “send the fool further.”

Accuracy note
We describe the customs as Wikipedia does and we do not call them old beyond what it says.

11. The press and the BBC, 1957

1 April 1957
Documented

On 1 April 1957 the BBC programme Panorama broadcast a three-minute report on the spaghetti harvest in southern Switzerland. Wikipedia says cameraman Charles de Jaeger had the idea, editor Michael Peacock gave him £100, and Richard Dimbleby read the commentary. About eight million people watched. Hundreds phoned the next day to question the story or to ask how they could grow their own spaghetti trees, and the BBC told them to “place a sprig of spaghetti in a tin of tomato sauce and hope for the best.” Newspapers were split over whether it was “a great joke or a terrible hoax on the public.”

Accuracy note
Wikipedia’s page on the day says the BBC declared the film a hoax on the news the next day. The page on the hoax itself records the BBC’s joking reply to callers. We report both. The point stands that millions believed a false report from a trusted broadcaster.
Myths and misconceptions

Each carries a label: True, False, Partly true, Legend or Disputed. We correct claims on both sides, including claims that Muslim writers repeat.

12. “April Fools’ Day began with Emperor Constantine and a jester called Kugel”

A popular belief
False

The story says the day began in the time of the Emperor Constantine. Winick of the Library of Congress calls it a hoax, and it is. In 1983 Joseph Boskin, a Boston University professor, invented it when pressed by Fred Bayles, an Associated Press reporter, who asked for the origin of the day. In his telling a group of court jesters told the emperor they could run the empire better, and the amused emperor made a jester named Kugel king for a day, who then passed an edict calling for absurdity. The AP ran the story and, in Winick’s words, retracted it some days later; Wikipedia says it went out on the wire on 1 April 1983. Wikipedia says it came to light when Boskin told his own class what he had done, and a student, Bill Swersey, wrote it up in the Daily Free Press on 14 April 1983.

Wikipedia adds that Boskin was sure Bayles would realize he was joking when he gave the jester’s name as Kugel, which is a kind of Jewish noodle pudding. Bayles later joined the faculty at Boston University.

Accuracy note
This is a modern invention. We include it because it is still repeated in books and on websites as history. Winick’s own comment on it: “do not take as fact everything you read about April Fools’ Day.”

13. “It began when France changed its calendar”

A popular belief
Disputed

This is the story in cards 5 and 6, in its 1564 form (the Edict of Roussillon) and its 1582 form (the Gregorian calendar). The edict is real. The link to April Fools’ Day is a guess. Winick found that the poem of 1561 is older than the edict, that French books of 1507 already begin the year in January, and that Panati gives no contemporary accounts or surviving invitations for his claim. The story is told, in other forms, about other holidays as well.

Accuracy note
We cannot say the story is impossible. We say it is not shown, and that the sources we trust treat it as a theory.

14. “Chaucer wrote about April Fools’ Day in 1392”

A popular belief
Disputed

See card 3. The line that seems to give 1 April may be a scribal slip for 2 May, as many scholars think, and the Museum of Hoaxes says Chaucer probably did not know the day at all. The reference is real as a line of poetry, and the claim that it names April Fools’ Day is disputed.

Accuracy note
We call this Disputed and not False, because Winick leaves the door open that it may be a glimpse of the day, and says many scholars think the date is an error.

15. “The day goes back to Noah and the dove”

A story from 1789
Legend

Wikipedia quotes the Public Advertiser of 13 April 1789, repeated by William Ralston Balch in 1895, that the day began from Noah’s “mistake” in sending the dove out of the ark too early on the first day of a month “among the Hebrews”, and that fools are sent on errands in memory of it. Wikipedia notes that no biblical scholar or historian is known to have mentioned a relationship. It also notes that the Hebrew calendar is lunisolar, so no fixed day always falls on 1 April.

Accuracy note
This is an eighteenth-century jest, written about 1789, and it is not a tradition from the time of Noah. Noah, peace be upon him, was a prophet of Allah, and we do not attach any prank to him.

16. “Pranks have been played in Persia since 536 BC”

A claim on Wikipedia
Disputed

Wikipedia says in its April Fools’ Day article that pranks have “reportedly” been played on dorugh-e Sizdah since 536 BC, making it “perhaps the oldest known joke day.” Its page on Sizdah Bedar says there is “no direct mention of such a celebration in history books prior to Qajar era.”

Accuracy note
The word “reportedly” is Wikipedia’s, and its own article on the festival does not support the date. We call it Disputed and we do not repeat the date as fact.

17. “It began with the spring equinox or the weather”

A popular belief
Disputed

Some say the day grew from spring celebrations at the equinox. IslamQA lists this among several differing opinions on the origin and says the origin “is not known for sure.” Winick notes that the Roman Hilaria was originally probably an equinox celebration, and that there is no hard evidence to link it to April Fools’ Day.

Accuracy note
We found no source that shows this. We call it Disputed, because it is a guess.

18. “April fish comes from the word for the Passion”

A claim in some articles
Legend

Some Muslim articles say poisson, fish, is a distortion of passion, so that the French phrase refers to the suffering of Jesus. We found no historian who says this. The Museum of Hoaxes reports that etymologists trace poisson d’avril to an old sense of a go-between (card 4).

Accuracy note
We do not carry this claim, and our case does not depend on it.

19. “It marks the fall of Granada, when Christians tricked the Muslims in 1492”

A story that circulates among Muslims
False

The story says that after failing to beat the Muslims in battle the Christians of Spain gave them liquor and tobacco, and that when the Spaniards took Granada in 1492 they celebrated it as April Fools’ Day. Wikipedia and the University of Cambridge both date the surrender of Granada to 2 January 1492, when Boabdil handed the keys to Ferdinand and Isabella. It was not 1 April.

Dunya News, a Pakistani outlet, rebuts the story in an article that it titled “Muslim myths surrounding April Fools’ Day.” It also says that Europeans did not know tobacco until after 1492, and that the Muslims of Spain were not ordered to leave until 1609. We cite it for the fact that such stories circulate, and for those two points, and no more.

Accuracy note
The Dunya article gives the date of the surrender as “12th of January”, which does not match Wikipedia or Cambridge, so we do not carry its date. The ruling of Islam on April Fools’ Day does not need this story. It rests on the prohibition of lying.

20. “It is harmless fun and nobody gets hurt”

A popular belief
False

From the Islamic view this is false. The Prophet, peace and blessings be upon him, said: “Woe to him who tells things, speaking falsely, to make people laugh thereby. Woe to him! Woe to him!” (Abu Dawud 4990), and he said that it is not lawful for a Muslim to frighten a Muslim (Abu Dawud 5004). A lie told to make people laugh is still a lie, and a prank that frightens or deceives someone is not made lawful by being called harmless.

The harm is also recorded outside the hadith. Wikipedia says critics call April Fools’ hoaxes “creepy and manipulative” and “rude”, and it lists “confusion, misinformation, waste of resources” and legal or commercial consequences among the effects. It also lists true news that was dismissed because of the date: the warnings about the 1946 tsunami, which killed 165 people in Hawaii and Alaska; the news of the death of the singer Marvin Gaye in 1984; the news of the death of the singer Selena in 1995, when many accused the radio staff of lying. In March 2020 various organizations warned against observing the day during the pandemic, and in 2021 Thailand’s police warned that posting fake news online could mean up to five years in prison.

Accuracy note
We cite the hadith for the ruling and Wikipedia for the examples of harm, as it reports them. They show that when a day is set aside for saying false things, true warnings can be disbelieved.

21. “Lying is allowed on April Fools’ Day because it is only a joke”

A common excuse
False

This is a claim about the ruling, and Islam answers it. The Prophet, peace and blessings be upon him, said: “Woe to him who tells things, speaking falsely, to make people laugh thereby. Woe to him! Woe to him!” (Abu Dawud 4990). He also guaranteed a house in Paradise for a man who avoids lying “even if he were joking” (Abu Dawud 4800). The scholars we quote below say the same of April Fools’ Day by name.

Accuracy note
The Prophet joked, and he said that he said only what is true (Tirmidhi 1990). So his joking is not a precedent for jokes that are lies. We answer this claim in full under the Islamic position.

22. Details in some Muslim articles: a “Dreck Magazine” in 1698 and a donkey parade in 1746

A claim in an article we otherwise cite for its ruling
Disputed

The IslamQA article on April Fools’ Day says the first English mention was in “a magazine known as Dreck Magazine” on 2 April 1698, and describes an announcement in the Evening Star in March 1746 of a parade of donkeys at Islington. We could not confirm either in the sources we read. Wikipedia gives John Aubrey’s “Fooles holy day” of 1686 as the first British reference, and reports the 1 April 1698 prank as people being tricked into going to the Tower of London to “see the Lions washed.”

Accuracy note
We cite the IslamQA article only for its ruling, and we do not carry its history. The ruling on lying does not depend on these details.
The customs and what they are tied to
1.
Fool’s errands and sealed messages
The first sure reference to the day is about errands: the Bruges poem of 1561 has a nobleman send his servant on absurd errands, and in Scotland the “hunt the gowk” message sends the victim from person to person. Ireland has the “important letter” that says “send the fool further.” All of them work by telling someone something that is not true.
2.
The paper fish and the paper tail
Wikipedia says that in France, Belgium and the French-speaking parts of Switzerland and Canada the day is often known as the “April fish” (poisson d’avril in French, pesce d’aprile in Italian), that a possible prank is to attach a paper fish to the victim’s back, and that bakeries in France sell chocolate fish that day. In Scotland, “tailie day” was the day on which paper tails were attached to people’s backs, often with an unflattering message.
3.
The reveal
In the UK a prank is sometimes revealed by shouting “April fool!” at the person fooled. Wikipedia says that in Germany the prank is usually revealed by shouting “April, April!” at the person. The person who is fooled is the “April fool”.
4.
The noon rule
A study by the folklorists Iona and Peter Opie in the 1950s found that in the UK, and in countries whose traditions come from the UK, the custom stops at noon, and a person who plays a prank after midday is considered the “April fool” themself.
5.
Media and institutional hoaxes
Wikipedia says that in several countries newspapers and news outlets publish a false story on the day, and that in Poland sometimes very sophisticated hoaxes are prepared by people, by media which often cooperate to make the information more credible, and even by public institutions. The BBC spaghetti film of 1957 (card 11) is a well-known example. Wikipedia records that the reception of such hoaxes is mixed, and that they can cause confusion, misinformation and waste of resources (card 20).
6.
Comparable days elsewhere
Iran’s dorugh-e Sizdah, the “lie of Thirteen”, falls on the 13th of Farvardin as part of Sizdah Bedar, and Wikipedia calls it similar to April Fools’ Day (card 7 and card 16). The Roman Hilaria and the Indian festival of Holi are only loose parallels and are not shown to be related.
The figures behind the day

Text only. We show no picture of the Prophet, peace and blessings be upon him, or of anyone else, and no religious symbol. Pagan deities appear here only as history, so that the claims made about them can be checked, and with no praise or depiction.

The Prophet Muhammad, peace and blessings be upon him

Seventh century
He joked, and he said only what is true

Companions said to him, “O Messenger of Allah! You joke with us?” He answered: “Indeed I do not say except what is true.” (Tirmidhi 1990). So the example of the Prophet is not a joke that is a lie. It is a joke in which every word is true. He is also reported to have said: “Woe to him who tells things, speaking falsely, to make people laugh thereby. Woe to him! Woe to him!” (Abu Dawud 4990).

Abu Dawud 5004 adds the second limit: when a man was frightened by a companion who took his rope as he slept, the Prophet said: “It is not lawful for a Muslim that he frightens a Muslim.”

Grading as shown on sunnah.com: Tirmidhi 1990 Hasan (Tirmidhi himself says hasan sahih); Abu Dawud 4990 Hasan (Al-Albani); Abu Dawud 5004 Sahih (Al-Albani).

ThemeJoking with truth, and never by frightening others.

Charles IX of France

1550 to 1574
The king of the calendar theory

Wikipedia gives his reign as 5 December 1560 to 30 May 1574; he died at 23. His mother Catherine de’ Medici was regent from 1560 to 1563. In the Edict of Roussillon of 9 August 1564 he decreed that the year would begin on 1 January, to end the different starting dates across France (card 5).

We have found no record that he, or his edict, started April Fools’ Day.

ThemeA real king and a real edict, joined to the day only by theory

Geoffrey Chaucer

Died 1400
The poet in the “Syn March bigan” line

The English poet of The Canterbury Tales. In the Nun’s Priest’s Tale a date that can be read as 1 April has been taken as the first mention of the day (card 3), but the same passage gives the position of the sun in Taurus, and many scholars think the date is a scribal error.

Whether Chaucer meant 1 April, or 2 May, or neither, is not settled.

ThemeA date in a poem that has been read two ways

Eloy d’Amerval

Active 1455 to 1508
Poet of the 1508 “poisson d’avril”

A French composer, singer, choirmaster and poet who lived mostly in the Loire Valley. His long poem Le livre de la deablerie (1508) has the line “poisson d’Apvril vien tost a moy”, which Wikipedia calls possibly the first reference to the celebration in France (card 4). Winick says the context does not make clear whether he meant 1 April or fools in general.

The meaning of the line is not settled.

ThemeAn early use of a phrase, with an unclear sense

Eduard de Dene

Bruges, 1561
The poet of the first sure reference

A Flemish poet whose handwritten Testament Rhetoricael contains the poem on “fool’s errand-day, which is the first of April”. Winick and the Museum of Hoaxes both name it as the earliest certain reference (card 2).

Our sources say little else about his life, and we do not add to it.

ThemeThe earliest sure mention of the day

John Aubrey

1626 to 1697
Author of the first clear English account

An English antiquarian and one of the leading folklorists of his day, in the Library of Congress’s words. His note of 1686 calls the day “Fooles holy day” and says it is kept on the first of April, “And so it is kept in Germany everywhere.” Wikipedia calls it the first British reference.

He treats it as a custom from abroad.

ThemeThe first English witness

Joseph Boskin and Fred Bayles

Boston, 1983
The professor and the reporter of the “Kugel” hoax

Joseph Boskin (1929 to 2025) taught at Boston University. Pressed by Fred Bayles of the Associated Press, he made up the story of Constantine and the jester Kugel (card 12). Bayles reported it and the AP ran it, then retracted it some days later. Wikipedia adds that Bayles later joined the faculty at Boston University.

Winick’s lesson from it: “do not take as fact everything you read about April Fools’ Day.”

ThemeA hoax about the origin of the hoax day

Charles de Jaeger, Michael Peacock and Richard Dimbleby

BBC Panorama, 1957
The team behind the spaghetti film

Wikipedia says cameraman Charles de Jaeger came up with the story, the editor Michael Peacock gave him a budget of £100, and the respected broadcaster Richard Dimbleby read the commentary, which made the report more believable. Peacock told the BBC in 2014 that Dimbleby knew his authority was being used to make the joke work and “loved the idea.”

Millions saw it and hundreds phoned in.

ThemeA trusted voice used to make a false story believable

Momus

Greek mythology
A figure of ancient myth, not a source of the day

Wikipedia describes Momus in Greek myth as the personification of satire and mockery, a “sharp-tongued spirit of unfair criticism” who was expelled from the company of the gods, and who appears in two of Aesop’s fables. Some modern pages call him the patron of practical jokes or of April Fools’ Day. We found no source in what we read that ties him to the day, and we treat that as modern framing.

He appears here as history only. Muslims worship Allah alone, and we show no image of him.

ThemeA mythological name that later writers attach to the day

Cybele and Attis

Ancient Rome and Anatolia
Pagan deities of the Hilaria, as history

Wikipedia calls Cybele an Anatolian mother goddess whose cult spread through Greek colonies, and names the Hilaria among her festivals and Attis as her consort. The Hilaria, held about 25 March, are one of the “loose parallels” of card 7. Winick says there is no hard evidence that connects it with April Fools’ Day.

They are named only to show what the parallel is. We do not praise them, and we show no image of them.

ThemeA festival of other gods, compared with the day only by guesswork

The gowk

Scots tradition
The cuckoo, and the fool

In the Scots hunt-the-gowk custom, the “gowk” is the victim: Wikipedia says the word is Scots for a cuckoo or a foolish person (card 10).

A name in a custom.

ThemeThe fool in the Scottish name of the day

The Islamic position

The Islamic position on April Fools’ Day does not rest on where the day came from, which is not known (see above). It rests on what the day is: a day on which people say false things to each other. Islam forbids lying, with no exception for a joke. It also forbids frightening a Muslim, even in jest. Both are shown below from the words of the Prophet, peace and blessings be upon him, and from the Quran.

1.
Abu Dawud 4990Hasan (Al-Albani)
Mu’awiyah ibn Jaydah al-Qushayri: the Prophet (ﷺ) said, “Woe to him who tells things, speaking falsely, to make people laugh thereby. Woe to him! Woe to him!”
This is the plainest text on the question. The lie told to make people laugh is the one the Prophet warns against, three times. The chapter heading on sunnah.com is “Stern warning regarding lying.”
2.
Tirmidhi 2315Hasan (Darussalam)
Bahz ibn Hakim from his father from his grandfather: the Prophet (ﷺ) said, “Woe to the one who talks about something to make the people laugh, in which he lies. Woe to him! Woe to him!”
The same warning by another chain. Tirmidhi says “this is a hasan hadith.” The chapter heading is “What has been related about one who says something to make people laugh.”
3.
Abu Dawud 4800Hasan (Al-Albani)
Abu Umamah: the Prophet (ﷺ) said, “I guarantee a house in the surroundings of Paradise for a man who avoids quarrelling even if he were in the right, a house in the middle of Paradise for a man who avoids lying even if he were joking, and a house in the upper part of Paradise for a man who made his character good.”
The Prophet names the one who gives up lying “even if he were joking.” The words “even if” show that the joke is the hardest case and is not an exception.
4.
Tirmidhi 1990Hasan (as shown on sunnah.com); Tirmidhi: hasan sahih
Abu Hurairah: they said, “O Messenger of Allah! You joke with us?” He said, “Indeed I do not say except what is true.”
The Prophet joked, and Islam does not forbid joy or humor. What he did was to joke with the truth. This is the model for a Muslim who wants to be funny.
5.
Abu Dawud 5004Sahih (Al-Albani)
Abd al-Rahman ibn Abi Layla: Companions of the Prophet (ﷺ) were traveling with him when a man slept, and one of them took the rope the man had with him, and the man was frightened. The Prophet (ﷺ) said, “It is not lawful for a Muslim that he frightens a Muslim.”
Many April Fools’ pranks work by giving someone a scare or false news, such as an emergency, a death or a lost job. The Prophet says that even a small fright in play is not lawful. The chapter on sunnah.com is about taking something in jest.
6.
Abdullah: the Prophet (ﷺ) said, “Truthfulness leads to righteousness, and righteousness leads to Paradise. And a man keeps on telling the truth until he becomes a truthful person. Falsehood leads to Al-Fajur (i.e. wickedness, evil-doing), and Al-Fajur (wickedness) leads to the (Hell) Fire, and a man may keep on telling lies till he is written before Allah, a liar.”
A habit is built a little at a time. This hadith is about the road that the small lie opens, and so it applies to the lie that is told for fun.
7.
Abdullah: the Prophet (ﷺ) said, “Truth leads one to Paradise and virtue leads one to Paradise and the person tells the truth until he is recorded as truthful, and lie leads to obscenity and obscenity leads to Hell, and the person tells a lie until he is recorded as a liar.”
The same hadith in Muslim. The chapter heading is “The abhorrence of lying, and the goodness and virtue of honesty.”
8.
Abu Huraira: the Prophet (ﷺ) said, “The signs of a hypocrite are three: 1. Whenever he speaks, he tells a lie. 2. Whenever he promises, he always breaks it (his promise ). 3. If you trust him, he proves to be dishonest. (If you keep something as a trust with him, he will not return it.)”
We cite it as a warning about the habit of lying, and we do not apply it to any person who has joked.
9.
“O you who have believed, fear Allah and be with those who are true.”
The Quran tells the believers to be with the truthful. The phrase is general and does not leave out one day of the year.
10.
“O you who have believed, fear Allah and speak words of appropriate justice. He will [then] amend for you your deeds and forgive you your sins. And whoever obeys Allah and His Messenger has certainly attained a great attainment.”
Speaking words of appropriate justice is tied to fear of Allah, and the verse promises that He will amend deeds and forgive sins for those who do so.
11.
“They only invent falsehood who do not believe in the verses of Allah, and it is those who are the liars.”
This verse speaks of those who invent falsehood against Allah’s verses. We cite it only to show how seriously the Quran takes falsehood, and not as a ruling on pranks.
12.
“When you received it with your tongues and said with your mouths that of which you had no knowledge and thought it was insignificant while it was, in the sight of Allah, tremendous.”
The verse warns against saying with the mouth what one does not know, thinking it small when it is tremendous with Allah. We cite it for the principle that words said lightly can weigh heavily, and not as a ruling on April Fools’ Day.
13.
Abu Dawud 1134Sahih (Al-Albani)
Anas ibn Malik: “When the Messenger of Allah (ﷺ) came to Medina, the people had two days on which they engaged in games. He asked: What are these two days (what is the significance)? They said: We used to engage ourselves on them in the pre-Islamic period. The Messenger of Allah (ﷺ) said: Allah has substituted for them something better than them, the day of sacrifice and the day of the breaking of the fast.”
This is the second, smaller point. April Fools’ Day is a custom with no source in Islam, and the Prophet replaced inherited days of play with the two Eids. We do not rest our case on this hadith. The case rests on lying and harm.
14.
Abu Dawud 4031Hasan Sahih (Al-Albani)
Ibn Umar: the Prophet (ﷺ) said, “He who copies any people is one of them.”
The Mufti of the Federal Territory (Malaysia) reports that Ibn Taymiyyah called the chain good, Ibn Hajar hasan, and al-Iraqi sahih. Scholars differ over how far “copying” reaches. Several of the rulings below cite it, and we cite it only as they do.
Our reading, and what we do not claim. We do not say that everyone who has played an April Fools’ joke meant harm, and we do not tell Muslims to be unkind to those who keep the day. We do not rest our case on any origin story. It rests on three things. First, lying is forbidden, and the Prophet names the lie told to make people laugh (Abu Dawud 4990, Tirmidhi 2315, Abu Dawud 4800). Second, frightening a Muslim, even in jest, is not lawful (Abu Dawud 5004), and many pranks work by fright or false news. Third, it is a custom with no basis in Islam, and the Prophet replaced older days of play with the two Eids (Abu Dawud 1134). The scholars whose rulings are read below say the same. The classical texts discuss narrow exceptions to the ban on lying, such as speech needed to reconcile people, and the sources we read do not list a prank among them. We also do not claim that a joke made only of true words, as the Prophet made, is forbidden: Tirmidhi 1990 shows he made them.
What scholars have ruled

Several rulings name April Fools’ Day. We show only what the scholars say, each with its source. Where a page also gives a history of the day, we do not carry it, because we could not confirm it (card 22). The last two rulings are general, on lying in jest, and do not name the day.

1.
“Lying is haraam whether the one who does it is joking or is serious. Lying in jest is haraam just like other kinds of lies.” It adds: “There is no a day or a moment when sharee’ah permits a person to tell lies or to say whatever he wants based on lies.”
The article also says “it does not matter what the origins of April fool are.” We cite the ruling only.
2.
Asked about the custom of April Fools: “Lying is not permissible at all, at any time. And it is not permissible to imitate the kuffar (non-Muslims) and to be like them, on this day or on any other, because the Prophet said: ‘Whoever imitates a people is one of them.’”
Source given by IslamQA: al-Shaqaiq magazine, no. 32, 31 March 2010.
3.
Asked for advice about April Fool’s: “This is imported in general from the false customs and it is not from the actions of the Muslims. Lying is not allowed. Not in April or in other than it. Lying is haram.” He adds that it is “a major sin from the major sins” and “not allowed in any time.”
Translated by Darussaafi from the Shaykh’s site (alfawzan.af.org.sa/node/13604).
4.
As translated: “it is lying and lying is prohibited legislatively. It is an imitation of the disbelievers and imitation of the disbelievers is prohibited.” He adds that such lies often scare Muslims or take their wealth for nothing, for example by telling a household that guests are coming so that they cook, or that a relative was run over by a car, “which is not allowed even outside this situation.”
We do not carry his account of where the custom came from, because we found no source for it. We cite his reasons only.
5.
“Deceiving is prohibited.” Of those who say a lie is a mere joke: “There is no justification for their lies and it remains to be haram.” He notes that the Prophet “used to give jokes, but his jokes were not embarrassing to the Sahaba… neither were his jokes made up of lies.”
We do not carry the history in the answer.
6.
“Consequently, lying is forbidden in any form, and on this occasion (April Fools’ Day) it is forbidden for four reasons: The prohibition of lying which is confirmed by the Quran and the Sunnah. The unwarranted grief or fear it may bring on a person or his entire family, even if only for one hour. The betrayal of trust it entails. The emulation of a silly custom that is not ours, that of lying.”
A reprint at Muslim Mirror (1 April 2014) credits this part to Sheikh Yusuf al-Qaradawi, and the About Islam page itself names Sheikh Atiyyah Saqr, former head of the Al-Azhar Fatwa Committee, for the rest. The live IslamOnline page no longer shows this text, so we cite it as published at About Islam.
7.
“It is sinful ( haram ) whether done seriously or jokingly.”
From the page “Beware of the Sin of the April Fool Joke.”
8.
“If the joking involves explicit lying and falsehood, it is obligatory to leave that gathering, and you will be rewarded if you leave the gathering because of the lying in the joking.”
Machine translation as shown on al-fatawa.com. The second sentence of the answer says that speech with insinuation and ambiguity, if it is truth and honesty, is not wrong. We cite only the ruling on lying.
9.
“As for joking with lies, or excessive joking, or joking in the form of mockery, this is not permissible.”
He first says that a little joking in truth is permissible, as the Prophet did. Machine translation as shown on al-fatawa.com.
These rulings agree: lying is forbidden whether in earnest or in jest, so April Fools’ Day gives no permission to lie. Several name the day and give a second reason, that it is a custom taken from others, and several give a third, that it frightens or deceives people and takes their trust.
Other monotheists who abstain

Muslims are not the only ones whose teaching puts truthfulness first. Jewish and Christian teaching is against lying and deceiving, and that is the against side we give first. We found no Jewish or Christian source that forbids the day by name, and some writers allow harmless jokes, so neither community is of one mind. We give the view and its limits.

Judaism

Torah and rabbinic teaching
Against lying; some allow harmless jokes

The Torah says: “You shall not steal; you shall not deal deceitfully or falsely with one another” (Leviticus 19:11), “Speak the truth to one another” (Zechariah 8:16), and “Lying speech is an abomination to GOD” (Proverbs 12:22), in the JPS translation on Sefaria.

Wikipedia explains the rabbinic idea of geneivat da’at, “theft of the mind”: Samuel of Nehardea in the Talmud said, “It is forbidden to mislead people, even a non-Jew,” one Midrash calls it the worst kind of theft, and it applies even where no money is lost, and even to a statement that is technically true but meant to leave a false impression.

Rabbi Eli Ozarowski, writing for the Orthodox Union, says that even where a lie causes no harm, “one should strive to never lie even in such cases wherever possible,” and that it is better to use wording that can be understood in more than one way, some of which are true.

Others allow it: the same OU page says lying would not be forbidden for a surprise party or for a brief joke that has no consequences, citing Halichot Bein Adam L’chavero and R. Shlomo Aviner, and adds that “others rule more strictly.”

Accuracy note
These sources do not name April Fools’ Day, so we claim no single Jewish ruling on the day. The permissive line is from the same OU page, and it adds that others rule more strictly.

Christianity

The New Testament, Proverbs and some writers
Against lying; some allow harmless pranks

The apostle Paul writes: “Wherefore putting away lying, speak every man truth with his neighbour: for we are members one of another” (Ephesians 4:25) and “Lie not one to another” (Colossians 3:9). The Book of Proverbs says of the one who deceives a neighbor and then says “Am not I in sport?”: he is “as a mad man who casteth firebrands, arrows, and death” (26:18 to 19). All are the King James Version.

Dr. Elizabeth Mitchell of Answers in Genesis wrote on 1 April 2012 that God hates lying, warned that “little lies of convenience” leave “little conviction holding us back when it ‘really’ counts,” and ended: “So when the fun of April Fools’ Day is over, don’t let the devil’s subtle tricks make a fool of you.” Sermon Academy applies Ephesians 4:25 to pranks: “A prank built on a lie, on fear, or on another person’s humiliation runs against that instruction.”

Others allow it: Answers in Genesis says most tricks are kept to “the good-natured and harmless,” and Sermon Academy says a harmless surprise or a practical joke that ends in shared laughter and no damage is a different matter.

Accuracy note
These sources do not forbid the day by name, so we do not claim that all Christians reject it. Many keep it. Both permissive statements come from the same two pages that give the warnings above.
Whether a Jewish or Christian group keeps the day is its own decision, on its own reasons. We cite their teaching against lying to show that truthfulness is not only an Islamic position, and we do not claim that their reasons are the same as ours.
For Muslims: what to do instead
1.
Joke with the truth, as the Prophet did
The Prophet, peace and blessings be upon him, said of himself, “Indeed I do not say except what is true” (Tirmidhi 1990). Funny true stories, wordplay and riddles that mislead no one are open to you, and they are what Ibn Baz calls “a little joking in truth.”
2.
Be with the truthful
Allah says: “O you who have believed, fear Allah and be with those who are true.” (Quran 9:119). Truthfulness leads to righteousness and to Paradise (Bukhari 6094). Let people know that your word is good on every day of the year.
3.
Do not frighten or shame anyone
It is not lawful for a Muslim to frighten a Muslim (Abu Dawud 5004). If a joke needs a scare, a lost job, a death or a mistake that embarrasses someone, do not make it.
4.
Do not pass on what you cannot confirm
On 1 April, news stories and posts are often false, and Wikipedia records that hoaxes can cause confusion, misinformation and waste of resources. The Quran criticizes those who speak “of which you had no knowledge” (24:15). Check before you share.
5.
If you have lied in jest, stop and ask for forgiveness
Allah says: “O you who have believed, fear Allah and speak words of appropriate justice. He will [then] amend for you your deeds and forgive you your sins. And whoever obeys Allah and His Messenger has certainly attained a great attainment.” (Quran 33:70 to 71). Ask a qualified scholar about any specific case.
6.
Be kind to neighbors and colleagues who keep the day
Allah says: “Allah does not forbid you from those who do not fight you because of religion and do not expel you from your homes - from being righteous toward them and acting justly toward them. Indeed, Allah loves those who act justly.” (Quran 60:8). You can be warm and polite, say that you do not take part in pranks, and keep your own Eids with joy (Abu Dawud 1134).
Sources

The history of the day

Parallels and figures

Quran and hadith

Fatwas

Jewish and Christian sources

Quran

Quran translations are Sahih International, from api.alquran.cloud, with each verse linked to quran.com. Hadith are linked to sunnah.com; gradings are given as shown there (Al-Albani for the Sunan). Where we use Wikipedia, we use it for what it reports and mark disputed points, and we check the main claims against other sources.