Wikipedia:Did you know

Did you know?
Introduction and rules
Introduction and rulesWP:DYK
General discussionWT:DYK
Supplementary rulesWP:DYKSG
Reviewing guideWP:DYKR
Nominate an articleWP:DYKCNN
Awaiting approvalWP:DYKN
April 1 hooksWP:DYKAPRIL
Preps and queuesT:DYK/Q
Admin instructionsWP:DYKAI
Main Page errorsWP:ERRORS
On the Main Page
Archived setsWP:DYKA
Just for fun
Monthly wrapsWP:DYKW
Scripts and botsWP:DYKSB
List of users ...
... by nominationsWP:DYKNC
... by promotionsWP:DYKPC

Wikipedia:Did you know (DYK) is the project page for the "Did you know" section on the Main Page. The DYK section showcases new or expanded articles that are selected through an informal review process. It is not a general trivia section. The choice of articles is subject to a set of criteria that are set out on this page.

The other sections of changeable content on the Main Page are coordinated at In the news, Picture of the day, Selected anniversaries, Today's featured list (currently Mondays and Fridays), and Today's featured article. More general discussion of the main page takes place at Talk:Main Page, and errors are reported at Wikipedia:Main Page/Errors.

Aims and objectivesEdit

Wikipedia's goal is to build and maintain an encyclopedia covering all branches of human knowledge. Hundreds of new articles are created and many more expanded each day on the English Wikipedia. DYK showcases new and improved content by presenting a series of facts ("hooks"), some of them accompanied by images, which link to selected articles. The hooks appear for a limited period in the "Did you know...?" box on the Main Page. Editors whose articles appear in DYK will receive an acknowledgement on their user talk pages. The choice of articles is subject to a series of criteria (see DYK rules below). Editors may nominate their own or someone else's work for a DYK appearance.

DYK aims to achieve the following five goals:

  • To showcase new and improved content, illustrating to readers the continuous improvement and expansion of Wikipedia's corpus of articles;
  • To highlight the variety of information on Wikipedia, thereby providing an insight into the range of material that Wikipedia covers.
  • To present facts about a range of topics which may not necessarily otherwise receive Main Page exposure;
  • To acknowledge the work that editors do to expand and improve Wikipedia, encouraging them to continue their efforts and thereby contributing to editor retention and ongoing content improvement;
  • To encourage readers to edit articles that appear on DYK or start their own, thus facilitating the recruitment of new editors.

What DYK is notEdit

DYK is not:

  • A smaller-scale version of either featured content or good articles, though selected good articles do appear in the DYK box. Articles must meet the basic criteria set out on this page but do not have to be of very high quality. As DYK's main purpose is to showcase new and improved content, it is not expected that articles appearing on DYK would be considered among the best on Wikipedia.
  • A collection of general trivia. The articles featured are specifically new and improved ones which meet the criteria set out below.
  • A means of advertising, or of promoting commercial or political causes. While it is fine to cover topics of commercial or political interest, DYK must not provide inappropriate advantage for such causes (e.g. during election campaigns or product launches).

DYK rulesEdit

DYK consists of a series of "hooks", which are interesting facts taken from Wikipedia's newest content, of the format "Did you know that...?" Thus, to nominate something to appear on DYK, an editor must either write or identify new content (see below for what qualifies as "new") and propose an interesting "hook".

DYK is only for articles that have achieved one of the following within the past seven days:

  • Created
  • Expanded at least fivefold
  • Promoted to good article status

For articles initially developed outside of article namespace, the date the article first appears in article space is counted as the first day towards the DYK seven-day rule.

Any registered user who is at least autoconfirmed may nominate a DYK suggestion; self-nominations are encouraged. To make a nomination, submit it here.

Eligibility criteriaEdit

Four basic criteria are used to determine whether a nomination is eligible for DYK, together with a review requirement. Other criteria may arise as a result of community discussion or policy (more details appear at Wikipedia:Did you know/Supplementary guidelines), but the following criteria account for most cases:

  1. New – At the time of nomination, an article must be considered new.
    1. For DYK purposes, an article is considered new if, within the last seven days, the article has been created in mainspace from a redlink or redirect; expanded at least fivefold in terms of its prose portion;[1][2] promoted to good article status; moved from userspace or draftspace into mainspace; or translated from another Wikipedia.
    2. The content that makes the article eligible must be new and original content on English Wikipedia.[a] The assessed length of both the old and new versions excludes wiki markup, templates, lists, tables, and references – this length is called the prose size. See WP:DYKcheck for instructions and details.
    3. An article is ineligible for DYK if it has previously appeared on the main page as a bold link at DYK. It is also ineligible if it has, within the year prior to nomination,[b] appeared as a boldlink In the news (ITN) or in the prose section of Wikipedia:Selected anniversaries (OTD), or as Today's featured article. Bolded names with dates listed at the bottom of OTD are not disqualified, nor are names listed in "Recent deaths" section of ITN.[3]
  2. Long enough – The article must be of sufficient length.
    1. Articles must have a minimum of 1,500 characters of prose (ignoring infoboxes, categories, references, lists, and tables etc.) The number of characters may be measured using this script (most accurate) or this one or this tool.
    2. DYK articles may freely reuse public domain text per Wikipedia's usual policy, with proper attribution. However, because the emphasis at DYK is on new and original content, text copied verbatim from public domain sources, or which closely paraphrases such sources, is excluded both from the 1,500 minimum character count for new articles, and from the fivefold expansion count for fivefold expanded articles.
    3. Lists and set index articles can be considered for DYK if they meet the minimum length requirement, in addition to DYK's other policies.
    4. In practice, articles longer than 1,500 characters may still be rejected as too short.
  3. Cited hook – (See more information under The hook, below.) The article as a whole should use inline, cited sources.
    1. The hook should include a definite fact that is mentioned in the article and likely to be perceived as unusual or intriguing by readers with no special knowledge or interest.[4]
    2. Each fact in the hook must be supported in the article by at least one inline citation to a reliable source, appearing no later than the end of the sentence(s) offering that fact. Citations at the end of the paragraph are not sufficient. This rule applies even when a citation would not be required for the purposes of the article.
  4. Within policy – Articles for DYK must conform to Wikipedia's core policies.
    1. Articles must meet the biographies of living persons policy. Articles on living individuals must be carefully checked to ensure that no unsourced or poorly sourced negative material is included. Articles and hooks that focus unduly on negative aspects of living individuals should be avoided.
    2. Article content must be verifiable.
    3. Articles should be free of copyright violations, including close paraphrasing and image copyright violations.
    4. Articles and hooks must adopt a neutral point of view, and should not be approved if they promote one side of an ongoing dispute.
  5. Review requirement (QPQ) – If you have nominated five or more articles in the past, you must review one other nomination (unrelated to you) for every subsequent article you nominate‍—‌this is called quid pro quo or QPQ.[c] The review must address all five criteria listed here.
    1. You can do your QPQ review before or after you make your nomination, but for your nomination to be approved you will need to provide a link, at your nomination, to your completed QPQ review. For help in learning the reviewing process, see the reviewers' guide.
    2. If your nomination is for multiple articles, a QPQ must be done for each article.
    3. For an article to be considered approved, there must be at least one full review with respect to the DYK criteria, rather than a simple "check mark". Subsequent reviews in a nomination may rely on their predecessors where their validity has not been disputed – however, only full reviews with no reliable predecessors count as a QPQ.
    4. Ideally, a QPQ should be submitted within a week of a nomination. After one week, and a reminder to the nominator, a nomination may be closed as "incomplete." QPQs do not expire and may be used at any time for a future DYK nomination.[5]
    5. The community may also choose to activate an "unreviewed backlog mode"; when active, editors who have nominated more than twenty articles are required to provide an extra QPQ in every nomination.[6]

The hookEdit


  • The title of the new article (or the text that it pipes to) must be in bold and linked to the new article.
  • The hook should start with an asterisk (*) to create a bullet, then a space, three periods (not the ellipsis character …), a space, and the word "that"; and end with a question mark. Example:
    • * ... that '''[[milk]]''' can come from cows?
  • The hook should be concise: no more than 200 characters (including spaces and the question mark, but not including the ..., the space immediately following the ..., or any (pictured)). While 200 is a hard limit, hooks near or at this limit may still be rejected at the discretion of reviewers and administrators. This tool can be used for counting characters.
  • If a passage from a reliable non-English source is quoted in the article as translated by a Wikipedia editor (because no published translation is available) a phrase from that translation can be quoted in the hook, subject to the discretion of the selecting reviewers and administrators. Ideally the nominator will vouch for the translation from their personal knowledge.


  • The hook should refer to established facts that are unlikely to change, and should be relevant for more than just novelty or newness.
  • The hook should be neutral.
  • Articles and hooks featuring election candidates up to 30 days before an election in which they are standing should be avoided, unless the hook is a "multi" that includes bolded links to new articles on all the main candidates.
  • When you write the hook, please make it "hooky", that is, short, punchy, catchy, and likely to draw the readers in to wanting to read the article – as long as they don't misstate the article content.


  • The first hook in the set on the main page must have an associated image.
    1. Commons:Copyright rules by subject matter
    2. Commons:Photographs of identifiable people
    3. Commons:Copyright rules by territory
    4. Fair-use images are not permitted on the main page. The image must be free and properly licensed (PD, GFDL, CC, etc.).
    5. The image must be suitable, attractive, interesting, and must display well in the small size of the {{main page image/DYK}} template (140x140 pixels, adjusted for aspect ratio).
    6. It must already be in the article (or a crop from an image already in the article, if necessary to maintain quality at small size); and
    7. It must be relevant to the article.
  • The first hook should be modified to include (pictured) in the appropriate place to make the connection to the image. If necessary, a slightly longer addition can be made if unclear from context, e.g., (pictured, flag of Zdxyrastan).
  • Pictures and videos used in all DYK articles should be suitably licensed: PD, GFDL, CC, etc., including fair use where appropriately applied.
  • The standard image and video code is {{main page image/DYK|image=filename.jpg|caption=Caption}}.
  • Administrators: when you add an image to DYK, it is automatically protected, so simply add an {{mprotected}} notice to the image description page (or {{C-uploaded}} plus a copy of the author attribution and the licence tag if you have uploaded a temporary copy from Commons).
  • Sounds: Sounds accompanying the DYK hook should have similar qualities to pictures, and should be formatted using {{DYK listen|filename.ogg|Brief description}}

Date requestsEdit

Individual special date requests should be made on the nomination template at the time it is created, or at WT:DYK. For upcoming special commemoration dates that would include multiple nominations, the request should be made as early as possible at WT:DYK,

Articles intended to be held for special occasion dates should be nominated within seven days of creation, start of expansion, or promotion to good article status. The nomination should be made at least one week prior to the occasion date, to allow time for reviews and promotions through the prep and queue sets, but not more than six weeks in advance. The proposed occasion must be deemed sufficiently special by reviewers. The timeline limitations, including the six week maximum, may be waived by consensus, if a request is made at WT:DYK, but requests are not always successful. Discussion clarifying the hold criteria can be found here: Wikipedia talk:Did you know/Archive 161#Revision 3; discussion setting the six week limit can be found here: Wikipedia talk:Did you know/Archive 65#Rhacophorus vampyrus.

April Fools' Day hooks are exempted from the timeline limit; see Wikipedia:April Fool's Main Page/Did You Know.

The review discussion should address both the usual DYK criteria and the appropriateness of holding the hook for the requested date. Considerations include:

  • DR1: The hook is part of a DYK special occasion project.
  • DR2: The hook should not put emphasis on a commercial release date of the article subject.
  • DR3: Listing a hook on the Main Page during the requested date does not make the hook itself non-neutral.
    • DR3a: Listing a hook that mentions a product or company on the Main Page during the requested date does not, by itself, make the hook promotional of that product or company.

The DYK processEdit

  • Rules (WP:DYK and WP:DYKAR) – how DYK works
  • DYK talk (WT:DYK) – for general discussion of the project
    • Includes issues with current or past nominations which may need wider discussion than on the corresponding nomination page (in which case add a note to the nomination page).
  • Nominations (T:TDYK) – where nominations are proposed and discussed
  • Preps and Queues (T:DYK/Q)
    • Prep areas – where hook "sets" are assembled and finalized – See How to promote a hook.
    • Queues – to which finalized hook sets are moved from "prep" by an administrator, and where they wait to be moved (by a bot) to the Main Page – The admin moving the hooks to the live template may edit or reject any hook at their discretion.
    • Rotation – If there are more than 120 approved nominations while at least ten prep/queue sets are filled, we rotate to two sets per day. If there are fewer than 60 approved nominations or fewer than six filled prep/queue sets, we change to one set per day.[7] The approved nominations page (WP:DYKNA) has a maximum size limit so it will sometimes not display or count the latest nominations.
  • Did you know... template (T:DYK) – the hooks currently appearing on the main page; DYKUpdateBot moves sets here from the Queue area according to a schedule.[d]
  • Old DYK entries are archived at Wikipedia:Recent additions after they leave the main page.
  • Errors (WP:ERRORS) – to report concerns about DYK items currently or shortly to be on the main page. If necessary an admin may edit or replace a hook on main page by changing the DYK template.
    • If a factual error is reported when the hooks are on the front page, try to replace the hook with another fact from the article, rather than just removing it.
    • In the case it has to be removed, try to replace it with another hook from the suggestions page.
    • If it is the first hook and hence has an associated picture, you must replace it with another hook with a picture.

DYK participantsEdit

Active editorsEdit

Any editor may volunteer and assist with DYK, simply by contributing to the department operations.

(Edit this list)

Actively involvedEdit

The following admins are (or would like to be) actively involved in the DYK process.

Willing to helpEdit

The following admins are not actively involved, but are willing to lend a hand if needed.

Other editorsEdit

The following users who are not administrators are actively involved in one or more aspects of DYK, including reviewing and vetting nominations, updating the template, and discussing DYK issues: (edit this page)

The following users are frequent nominators and contributors to DYK:


DYK made its first Main Page appearance on 22 February 2004.[8] The article, "Pencil sharpener", was developed by Raul654. An April 2004 archived copy shows DYK located in the space now occupied by "In the news".[9] Credit recognition for article creators started on 24 November 2004,[10] DYK began placing DYK notifications on article talk pages on 13 January 2006,[11] and nominators started receiving credit on 13 May 2006.[12]



DYK Awards

Recognitions for editors who make a valued contribution to Wikipedia:Did you know.

See alsoEdit


  1. ^ In practice, if the amount of copied content does not exceed one-fifth of the total prosesize of the added content, the article can be considered a fivefold expansion.
  2. ^ If an article appears at ITN, OTD, or TFA while a DYK nomination for the same article is in progress, the article should be removed from consideration for DYK, subject to the normal rules on expiry. This may require pulling the article from prep or queue.
  3. ^ These requirements are based on articles, and not nominations—reviewing a "multi nomination" will grant the reviewer one QPQ credit for each nominated (bold-link) article reviewed.
  4. ^ The timing of this 6-hour changeover is coordinated through manual modifications to ParserFunctions arguments in a {{DYK-Refresh}} template located on the DYK template talk page.


  1. ^ For discussion on the fivefold expansion, please see RfC on the Fivefold expansion rule
  2. ^ For discussion removing the 2X BLP criteria, please see Archive: Feb 26, 2018 – Remove the 2x BLP criterion
  3. ^ For discussion of the recent deaths section, see Wikipedia talk:Did you know/Archive 108#Prep 2 (ITN "recent deaths" section & DYK)
  4. ^ Amended on 2022-11-29 by RfC.
  5. ^ For discussion on QPQs please see RfC on Excessively late supply of QPQ credits
  6. ^ See Wikipedia talk:Did you know/Archive 182#RfC Discussion: Details of implementing EEng's propsal "Unreviewed backlog mode" for clarification on this requirement as it relates to multi-article nominations.
  7. ^ Special:Diff/1132830603
  8. ^ Special:PermanentLink/2500457
  9. ^ "Main Page". 2004-04-03 – via
  10. ^ "UpdatedDYK: Difference between revisions". 2004-11-24.
  11. ^ "DYK talk". 2006-01-13.
  12. ^ "Template:UpdatedDYKNom". 2006-05-12.