> **For coding agents and LLMs:** This is one Social Fetch marketing page (markdown export). For API orientation start with [`/llms.txt`](https://www.socialfetch.dev/llms.txt); for auth and crawl rules use [`/agents.txt`](https://www.socialfetch.dev/agents.txt); for every operation use [`/llms-endpoints.txt`](https://www.socialfetch.dev/llms-endpoints.txt). ## This page - **On-site (HTML):** - **Markdown (.mdx) URL:** --- # Wikipedia On This Day API Anniversaries, births, deaths, events and holidays for a month and day. `GET /v1/wikipedia/on-this-day?month=11&day=2&lang=en` returns the entries for that day. `type` chooses what to return: `selected`, `births`, `deaths`, `events`, `holidays` or `all` (the default). Each requested part lands in its own array, so `data.selected`, `data.births`, `data.deaths`, `data.events` and `data.holidays` are filled only when asked for. Each type can be several MB, and `all` returns every type at once, so ask for one `type` when you only need one list. Each entry has `text`, `year` and `pages`. `text` is the event, birth, death, holiday or news line, `year` is the year when the entry has one, and `pages` holds page summaries with titles, descriptions and extracts for the linked articles. `month` is 1 to 12 and `day` is 1 to 31, checked against the month. Most editions do not serve the on-this-day feed: an edition without it is `not_found`, while a supported edition with no entries for the day is `found` with `empty: true`. The response echoes `month`, `day` and `type`. ## Request - **Endpoint:** `GET /v1/wikipedia/on-this-day` - **Credits:** 1 credit Failed requests are free - **Input:** by month and day - **Full reference:** [docs](https://www.socialfetch.dev/docs/api/v1/wikipedia/on-this-day/get) - **Platform page:** [/platforms/wikipedia](https://www.socialfetch.dev/platforms/wikipedia) ## FAQ ### How do I get only births or deaths? Set type=births or type=deaths. That fills the matching array and leaves the other arrays null. type=all fills every array the edition has for the day. An edition without the feed is not_found for every type. ### Does the day have to exist in the month? Yes. month is 1 to 12 and day is 1 to 31, and the pair is validated, so month=2 and day=30 is a 400. February 29 is accepted because it exists in a leap year. ### What is in pages? pages holds the linked articles as page summaries, with title, description, extract and URLs. Use the page route when you need the full record for one of them. ### How many credits does on-this-day cost? Pricing is documented on the operation in the API registry (shown on this page). Confirm on every response with meta.creditsCharged: that field is the billing source of truth.