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Rare Disease Day

annual health awareness day (last day of February)
Event world_day Q4898140
Rare Disease Day
National Center for Advancing Translational Sciences · Public Domain · Wikimedia
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Summary

Rare Disease Day is a world day[1]. It draws 232 Wikipedia views per month (world day category, ranking #74 of 248).[2]

Key Facts

  • Commons category: Rare Disease Day[3]
  • Commemorates: rare disease[4]
  • Inception: 2008[5]
  • Organizer: European Organization for Rare Diseases[6]
  • Day in year for periodic occurrence: last day of February[7]
  • Official website: https://www.rarediseaseday.org/what-is-rare-disease-day/[8]
  • Short name: RDD[9]

Why It Matters

Rare Disease Day has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[10] It is known by 26 alternative names across languages and contexts.[11]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . rarediseaseday.org. rarediseaseday.org. Provenance: wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . rarediseaseday.org. rarediseaseday.org. Provenance: wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [10] ↑ . Wikidata sitelinks. wikidata.org.
  3. [11] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Rare Disease Day. Retrieved October 17, 2026, from https://4ort.xyz/entity/rare-disease-day
MLA “Rare Disease Day.” 4ort.xyz Knowledge Graph, 4ort.xyz, 17 Oct. 2026, https://4ort.xyz/entity/rare-disease-day.
BibTeX @misc{4ortxyz_rare-disease-day_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Rare Disease Day}}, year = {2026}, url = {https://4ort.xyz/entity/rare-disease-day}, note = {Accessed: 2026-10-17}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Rare Disease Day — https://4ort.xyz/entity/rare-disease-day (retrieved 2026-10-17)

Canonical URL: https://4ort.xyz/entity/rare-disease-day · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 4d ago · Cassiuso · 2026-10-15 view diff on Wikidata ↗
    Instance of → —
    Day in year for periodic occurrence → last day of February
    Inception → +2008-00-00T00:00:00Z
    Organizer → European Organization for Rare Diseases
    + 8 other properties edited (see Wikidata diff for full list)
    "/* wbremoveclaims-remove:1| */ Date of promulgation: 2008"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.