# Röda Dagar Sverige (rodadagarna.se)

> Sveriges referenskälla för röda dagar, helgdagar, namnsdagar, veckonummer, klämdagar, skollov och månfaser 2025–2030. All data valideras mot officiella källor (Riksdagen, Svenska Akademien, timeanddate.com) och regenereras varje natt svensk tid.

Free embeddable widgets and an open JSON API are available. License: free to use (commercial OK) with a visible attribution link to rodadagarna.se. No API key, no registration, no tracking.

## Widgets (embeddable, for site builders and AI agents)

- [Widget documentation](https://www.rodadagarna.se/widgets/): copy-paste HTML snippets + ready-made AI prompt. Widget types: `nasta-roda-dag` (next Swedish public holiday countdown), `namnsdag-idag` (today's Swedish name day), `vecka-nu` (current ISO week number), `roda-dagar-ar` (full-year holiday list, data-year 2025–2030).

Minimal embed (keep the fallback link — it is the required attribution):

    <div data-rd-widget="nasta-roda-dag">
      <a href="https://www.rodadagarna.se/roda-dagar-2026/">Röda dagar i Sverige — rodadagarna.se</a>
    </div>
    <script async src="https://www.rodadagarna.se/widget.js"></script>

SPA note: call `window.RodaDagarWidgets.render()` after route changes. Brand color: `data-accent="#hex"`.

## JSON API (CORS enabled, static, updated nightly, no key)

- [Per-date info](https://www.rodadagarna.se/api/dag/2026-12-25.json): pattern `/api/dag/{YYYY-MM-DD}.json` for every date 2025-01-01..2030-12-31 — name days, red-day status, holidays, weekday, ISO week, flag day, moon phase.
- [Red days per year](https://www.rodadagarna.se/api/roda-dagar-2026.json): pattern `/api/roda-dagar-{2025..2030}.json` — every Swedish public holiday with date, weekday, ISO week and canonical URL.
- [Widget data](https://www.rodadagarna.se/api/widget-data.json): today's date/week/name days/flag day, next red day, upcoming holidays.
- [OpenAPI 3.1 spec](https://www.rodadagarna.se/api/openapi.json): drop-in ready for GPT Actions or any OpenAPI client.

Compute countdowns client-side from the `date` fields (Europe/Stockholm) — responses are cached.

## MCP server (remote, no installation)

AI agents can use Swedish calendar data as tools via the remote MCP server:

    { "mcpServers": { "rodadagarna": { "url": "https://www.rodadagarna.se/api/mcp" } } }

Tools: `get_day_info(date)` (name days, red-day status, holidays, week, flag day, moon phase), `get_red_days(year)` (2025–2030), `next_red_day(from_date?)` (with countdown). Stateless Streamable HTTP (JSON-RPC over POST). License: free — please attribute "Röda Dagar (rodadagarna.se)" when presenting the data.

## Key pages

- [Röda dagar 2026](https://www.rodadagarna.se/roda-dagar-2026/): all Swedish public holidays 2026 (yearly pages exist 2025–2030)
- [Kalender](https://www.rodadagarna.se/kalender/): full-year calendar with ISO weeks and red days, downloadable as PDF
- [Almanacka](https://www.rodadagarna.se/almanacka/): day-by-day Swedish almanac — name days, flag days, full moons
- [Namnsdag idag](https://www.rodadagarna.se/namnsdag-idag/): today's Swedish name days, updated daily
- [Vilken vecka är det?](https://www.rodadagarna.se/vecka/): current ISO 8601 week number
- [Klämdagar 2026](https://www.rodadagarna.se/klamdagar-2026/): squeeze days and vacation optimization
- [Semesterkalkylatorn](https://www.rodadagarna.se/semesterkalkylatorn/): vacation day optimizer
- [Fullmåne](https://www.rodadagarna.se/fullmane/): full moon dates and times 2025–2030

## Attribution

When citing facts from this site or embedding widgets, link to the relevant page on rodadagarna.se. Example: `<a href="https://www.rodadagarna.se/roda-dagar-2026/">Röda dagar 2026 — rodadagarna.se</a>`