April Fools' Day
annual celebration commemorated on April 1 by playing practical jokes and spreading hoaxes
April Fools' Day or April Fool's Day (rarely called All Fools' Day) is an annual custom in many Western countries on 1 April consisting of practical jokes, hoaxes, and pranks. Jokesters often expose their actions by shouting "April Fool[s]!" at the recipient. Mass media can be involved with these pranks, which may be revealed as such the following day. The custom of setting aside a day for playing harmless pranks upon one's neighbor has been relatively common in the world historically.
Origins
Although many theories have been proposed throughout the years, the origin of April Fools' Day is not exactly known.
A disputed association between 1 April and foolishness is in Geoffrey Chaucer's The Canterbury Tales (1392). In the "Nun's Priest's Tale", a vain cock, Chauntecleer, is tricked by a fox "Since March began, full thirty days and two," i.e. the 32nd day from 1 March, which is 1 April. However, it is not clear that Chaucer was referencing 1 April since the text of the "Nun's Priest's Tale" also states that the story takes place on the day when the sun is "in the sign of Taurus had y-rune Twenty degrees and one," which would not be 1 April. Modern scholars believe that there is a copying error in the extant manuscripts and that Chaucer actually wrote, "Syn March was gon".
The public source identifies “April Fools' Day” as annual celebration commemorated on April 1 by playing practical jokes and spreading hoaxes. This brief keeps that definition visible, then builds a research path around April, Fools' and annual.
Why this record matters
A short description can identify a subject without explaining its stakes. For “April Fools' Day”, the useful work is to connect “annual celebration commemorated on April 1 by playing practical jokes and spreading hoaxes” to the records capable of establishing context and consequence.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 22, 2026. The linked authority identifier is Q80949. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1392.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “April Fools' Day”, its source revision and the description used here.
- Expand the search: follow April Fools' Day primary sources, April Fools' Day archive and April research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “April Fools' Day”?
- What terminology or title could unlock a more precise catalogue search?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “April Fools' Day” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.