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World Statistics Day - October 20, the UN-recognised day celebrating official statistics

World Statistics Day on October 20 is a UN-recognised international day established by the UN Statistical Commission in 2010 to highlight the role of official statistics in national development. First observed on October 20, 2010; second edition October 20, 2015; third on October 20, 2020. Not a public holiday.

UN

International observancePublished October 14, 2026

At a glanceInternational observance
Observed in
UN
When
October
Frequency
Same date every year
Type
Days off
Varies by country
Public status
Varies by country; consult local government gazette
Last reviewed: October 14, 2026
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World Statistics Day on October 20 is a UN-recognised international day established by the UN Statistical Commission in 2010 to celebrate the role of official statistics in national development. First observed October 20, 2010; subsequent editions 2015 and 2020; next edition 2025. Observed every five years, aligned with the global census round. Not a public holiday.

The one-line summary

UN Statistical Commission-designated day established in 2010, observed every five years on October 20. Aligned with global census round. Most recent theme: "Driving change with quality statistics and data for everyone" (2025). Not a public holiday.

Origin and history

World Statistics Day was established in February 2010 by the UN Statistical Commission at its 41st session in New York. The Commission proposed the day "to recognize the importance of official statistics in national development" and to celebrate the achievements of national statistical offices. The UN General Assembly endorsed the proposal in Resolution 64/267 in July 2010, making the day one of the more quickly adopted UN days.

The first World Statistics Day on October 20, 2010, was marked by 103 countries with conferences, school events, and the release of national statistical yearbooks. The day's success led to a five-year cycle: 2015 ("Better data, better lives"), 2020 ("Connecting the world with data we can trust"), and 2025 ("Driving change with quality statistics and data for everyone"). The cycle aligns with the World Programme for the Census of Population and Housing (2010, 2020, 2030).

103Countries that observed the 2010 inaugural day
5yCadence, aligned with the global census round
2010Established by UN Statistical Commission

How it is observed

World Statistics Day is primarily a professional observance. National statistical offices host conferences, award ceremonies, and public lectures; some release special statistical products (a "Statistical Yearbook 2020," for example) timed to the day. The US Census Bureau and Statistics Canada mark the day with public campaigns; the UK Office for National Statistics (ONS) holds annual user-conferences around the date.

Schools and universities mark the day with statistics-literacy outreach, public lectures on the role of data in democracy, and student competitions. The Royal Statistical Society (UK), American Statistical Association (US), and International Statistical Institute (ISI) use the day to advocate for evidence-based policymaking and funding for statistical agencies.

Global statistics system

The global statistical system is anchored by the UN Statistical Commission (the highest body, with 24 member-state chief statisticians), the UN Statistics Division (the secretariat), the World Bank Group (production of poverty and economic statistics), the IMF (financial soundness indicators), and the OECD (economic statistics). Together these bodies coordinate the production of over 200 global statistical datasets.

🇺🇳
UN Statistics Division
UN Statistics Division, established 1947, produces the flagship Statistical Yearbook (since 1948) and coordinates the global indicator framework for the SDGs.
🇪🇺
Eurostat
EU statistical agency. Publishes Eurostat Yearbook and European Statistics Day every October 20.
🇺🇸
U.S. Census Bureau
Principal US statistical agency, founded 1902. Conducts the US decennial census (2010, 2020, 2030).
🇨🇳
National Bureau of Statistics of China
Founded 1952. Produces China Statistical Yearbook and conducts the Chinese census (2010, 2020).
🇮🇳
Ministry of Statistics and Programme Implementation
Indian central statistical agency. Conducts the Population Census and Economic Census.
🇧🇷
IBGE (Brazil)
Brazilian Institute of Geography and Statistics. Conducts the Brazilian census (2010, 2022).

Controversies and criticism

World Statistics Day has faced two notable critiques. First, official statistics produced in controlled contexts can be subject to political pressure: the 2020 edition coincided with the COVID-19 pandemic, where statistical agencies faced criticism from governments about case and mortality counts. Second, the day's five-year cadence (2010, 2015, 2020, 2025) means it is sometimes overlooked in non-census years.

The UN Statistics Division responded by launching the "Data for Sustainable Development" platform in 2015 to keep the day's themes relevant annually, and by commissioning annual reports from member-state statistical agencies between editions. The 2020 theme of trust was a direct response to data-quality concerns in the pandemic.

In other countriesNational statistical offices mark World Statistics Day with public-facing events. Some, like Statistics Canada, hold user conferences; others, like Statistics South Africa, release new statistical yearbooks on the day.

Related observances

October has several UN-designated observances: World Food Day (Oct 16, FAO), World Cities Day (Oct 31, UN-Habitat), International Day of the Girl Child (Oct 11), World Teachers' Day (Oct 5). World Statistics Day is the only one focused on data infrastructure.

Sources

UN Statistical Commission2010UN General Assembly Resolution 64/2672010UN Statistics Division2025OECD Statistics Directorate2015World Bank Development Data Group2020

Frequently asked questions

When is World Statistics Day 2026?

Tuesday, October 20, 2026. World Statistics Day is observed every five years on October 20. The most recent edition was October 20, 2020 (with the theme "Connecting the world with data we can trust"). The next edition will be October 20, 2025; the 2030 edition will be October 20, 2030.

Who established World Statistics Day?

World Statistics Day was established by the United Nations Statistical Commission, the highest body for official statistics in the UN system. The Commission decided at its 41st session in February 2010 to proclaim October 20, 2010, as the first World Statistics Day. The decision was endorsed by the UN General Assembly in Resolution 64/267.

Why every five years?

The five-year cycle aligns the day with the global census round (2010, 2020, 2030), the global indicator framework reporting cycle (2015, 2020, 2025), and the Sustainable Development Goals (2015-2030) reporting calendar. It gives statistical agencies a fixed cadence to celebrate the production of major datasets and to publish flagship statistical yearbooks.

Is World Statistics Day a public holiday?

No. World Statistics Day is an international professional day, not a public holiday in any country. National statistical offices mark the day with events, conferences, and the release of special statistical products; government offices, banks, and most businesses operate normally on October 20.

What is the theme of World Statistics Day 2025?

The theme of World Statistics Day 2025 is "Driving change with quality statistics and data for everyone." It was announced by the UN Statistics Division in early 2025. The 2020 theme was "Connecting the world with data we can trust," which highlighted the role of official statistics in the COVID-19 pandemic response.

How is World Statistics Day observed?

National statistical offices mark the day with conferences, awards ceremonies, public lectures, school outreach programs, and the release of new statistical products. Major events include the ISI World Statistics Congress (held every two years, hosted by the International Statistical Institute), Eurostat's European Statistics Day events, and the US Census Bureau's Statistics Day campaign.

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