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Awareness, rights, education, social causes, community participation and international advocacy observances.

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294 observances

All observances

Source-backedFixed AnnualIn-depth guide

International Day of Action for Rivers

14 March · international river-protection and community-rights action observance

International Rivers states that participants at the first International Meeting of People Affected by Dams in Curitiba, Brazil, adopted the International Day of Action Against Dams and For…

Source-backedFixed AnnualIn-depth guide

International Day of Hope

12 July · United Nations / international observance

A/RES/79/270

Source-backedFixed AnnualIn-depth guide

International Day of Peace

21 September · United Nations / international observance

A/RES/36/67

Source-backedRule Based AnnualIn-depth guide

International Day of Pink

Second Wednesday of April · International anti-bullying, anti-discrimination and inclusion campaign; current organizer material especially centers 2SLGBTQIA+ inclusion and school/community education

International Day of Pink first-party campaign material verifies the second-Wednesday-in-April cadence and current 2026/2027 editions; archived Government of Canada material independently d…

Source-backedFixed AnnualIn-depth guide

International Day of Play

11 June · United Nations / international observance

A/RES/78/268

Source-backedFixed AnnualIn-depth guide

International Every Girl Wins Day

13 March · international girls’ equality, opportunity and leadership awareness initiative

Fiji Parliament’s 13 March 2025 Hansard states that International Every Girl Wins Day is celebrated annually on March 13 and was established in 2019 by Every Girl Wins Institute.

Source-backedFixed AnnualIn-depth guide

International Fact-Checking Day

2 April · Organizer-backed global information-integrity observance

International Fact-Checking Network (IFCN) at Poynter

Source-backedRule Based AnnualIn-depth guide

International Girls In ICT Day

Fourth Thursday in April · International Telecommunication Union observance

Source-backedRule Based AnnualIn-depth guide

International Homeless Animals’ Day®

Third Saturday in August annually; 15 August 2026 · International / International Society for Animal Rights campaign

ISAR states it created International Homeless Animals’ Day in 1992 and observes it annually on the third Saturday in August; the 2026 date is August 15.

Source-backedFixed AnnualIn-depth guide

International Left-Handers Day

13 August each year · International / Left-Handers Club awareness observance

The Left-Handers Club states that it launched International Left-Handers Day on 13 August 1992 and continues to identify August 13 as the annual observance date.

Source-backedFixed AnnualIn-depth guide

International Literacy Day

8 September · UNESCO international observance

UNESCO 14 C/Resolution 1.441

Source-backedFixed AnnualIn-depth guide

International Men’s Day

19 November each year; 2026 edition confirmed · Organizer-led international observance focused on men and boys

The International Men’s Day organization states that the observance is marked each year on November 19 and confirms the 2026 edition and theme.

Source-backedFixed AnnualIn-depth guide

International Migrants Day

18 December · United Nations international observance

A/RES/55/93

Source-backedFixed AnnualIn-depth guide

International Non-Binary People's Day

14 July · International community observance / U.S. government informational recognition

Minnesota government information identifies July 14 as International Non-Binary People's Day and notes it is not a federal or state-recognized holiday; Snohomish County describes it as obse…

Source-backedFixed AnnualIn-depth guide

International Right to Know Day

28 September · Access-to-information and transparency advocacy; historically used by OSCE and civil-society partners

The OSCE Mission to Serbia documented International Right to Know Day on 28 September in partnership with public institutions, UNDP, journalists and transparency groups.

Source-backedFixed AnnualIn-depth guide

International Roma Day

8 April · international Roma culture, rights and equality observance

Council of Europe source verification / international Roma community observance

Source-backedEdition SpecificIn-depth guide

International School Meals Day

12 March 2026 (current edition confirmed) · WFP / UN Armenia and Armenian school-meals partners

A 2026 UN Armenia/WFP release identifies International School Meals Day as 12 March 2026.

Source-backedRule Based AnnualIn-depth guide

International ShakeOut Day

Third Thursday in October; 15 October in 2026 · Great ShakeOut earthquake drills / international participation

Great ShakeOut materials identify International ShakeOut Day as the third Thursday of October and promote earthquake drill participation

Source-backedFixed AnnualIn-depth guide

International Students’ Day

17 November annually · European Students’ Union / international student movement remembrance

The European Students’ Union marks November 17 as International Students’ Day and ties the commemoration to the 1939 Nazi attack on Czech students and universities.

Source-backedFixed AnnualIn-depth guide

International Transgender Day of Visibility

31 March annually · International LGBTQ community observance / GLAAD reference

GLAAD identifies International Transgender Day of Visibility on 31 March and describes it as observed each year.

Source-backedRule Based AnnualIn-depth guide

International Week of Science and Peace

Week in which 11 November falls (9–15 November on the UN calendar) · United Nations international week

A/RES/43/61

Source-backedFixed AnnualIn-depth guide

International Widows' Day

23 June · United Nations / international observance

A/RES/65/189

Source-backedFixed AnnualIn-depth guide

International Women of Color Day

1 March · International / Women of Color recognition with U.S. institutional usage

U.S. Navy/DVIDS material identifies March 1 as International Women of Color Day and notes recognition by the National Institute for Women of Color since 1986; University of Pennsylvania mat…

Source-backedFixed AnnualIn-depth guide

International Women's Day

8 March · United Nations-recognized international observance

United Nations observance

Source-backedFixed AnnualIn-depth guide

International Women’s Day for Peace and Disarmament

24 May · International feminist peace movement / WILPF

Women’s International League for Peace and Freedom states that pacifist feminists established 24 May as International Women’s Day for Peace and Disarmament in the early 1980s.

Source-backedFixed AnnualIn-depth guide

International Youth Day

12 August · United Nations / international observance

A/RES/54/120

Source-backedFixed AnnualIn-depth guide

Journée internationale de la Francophonie

20 March; events are organized around 20 March each year · Organisation internationale de la Francophonie / international observance

The OIF states that the Journée internationale de la Francophonie is celebrated every year around 20 March and documents the 20 March 2026 edition.

Source-backedFixed AnnualIn-depth guide

Kodomo no Hi (Children’s Day)

5 May annually · Japan / statutory national holiday

Japan’s National Holidays Act establishes Children’s Day on May 5; Cabinet Office historical material documents its original 1948 establishment and date-selection rationale.

Source-backedFixed AnnualIn-depth guide

League of Women Voters founding anniversary

14 February · United States / League of Women Voters organizational founding anniversary

League of Women Voters first-party history establishes Carrie Chapman Catt’s 1919 proposal and formal organization of the national League in Chicago on 14 February 1920. The organization co…

Source-backedRule Based AnnualIn-depth guide

Letter Carriers’ Stamp Out Hunger® Food Drive

Second Saturday of May · United States and participating U.S. postal jurisdictions / National Association of Letter Carriers annual food drive

NALC states that its annual Letter Carriers’ Stamp Out Hunger® Food Drive launched in 1993 and is held on the second Saturday in May. NALC also states that branch, rural-office and individu…

Source-backedRule Based AnnualIn-depth guide

Make A Difference Day

Fourth Saturday in October · United States / volunteer-service tradition associated with USA WEEKEND and Points of Light

Points of Light documents Make A Difference Day as beginning in 1992 and taking place annually on the fourth Saturday in October.

Source-backedFixed AnnualIn-depth guide

Malala Day

12 July annually · Global girls’ education and youth-advocacy context

The Malala Fund continues to use Malala Day around 12 July to amplify girls’ education and young people’s voices, building on Malala Yousafzai’s UN address.

Source-backedRule Based AnnualIn-depth guide

Martin Luther King Jr. Day / Idaho Human Rights Day

Third Monday in January; 19 January 2026 · Idaho, United States / state statutory holiday observed with Martin Luther King Jr. Day

Idaho Code § 73-108 and Idaho judicial/state holiday calendars place Martin Luther King, Jr. – Idaho Human Rights Day on the third Monday in January; Idaho government history records the co…

Source-backedFixed AnnualIn-depth guide

Mean Girls Day

3 October · Mean Girls film fandom / rights-holder-recognized pop-culture observance

October 3 is a grassroots Mean Girls fan observance built around the film scene in which Cady gives Aaron the date. Paramount has repeatedly recognized and activated the fan date, including…

Source-backedRule Based AnnualIn-depth guide

Mindanao Week of Peace

Last Thursday of November through first Wednesday of December each year (26 November–2 December in 2026) · Philippines / Mindanao peace observance established by presidential proclamation

Philippine Proclamation No. 127 (2001) declares the last Thursday of November through the first Wednesday of December of every year thereafter as Mindanao Week of Peace.

Source-backedFixed AnnualIn-depth guide

Mozambican Women’s Day (Dia da Mulher Moçambicana)

7 April annually · Mozambique / national holiday

Mozambique’s Government Portal lists 7 April as Dia da Mulher Moçambicana and links the holiday to remembrance of Josina Machel.

Source-backedFixed AnnualIn-depth guide

National Acadian Day

15 August · Canadian observance celebrating Acadian culture and heritage

Government of Canada / Canadian Heritage; celebrated since 1881 and recognized in federal law in 2003

Source-backedFixed AnnualIn-depth guide

National Africa Civility Day

15 September · Africa-focused / World Civility Presidential Club-created humanitarian recognition observance

National Day Archives records September 15 and credits World Civility Presidential Club with founding the observance in 2020; current awareness calendars retain September 15.

Source-backedEdition SpecificIn-depth guide

National American Sign Language Day

15 April 2026 · United States / state-government recognition and community observance

California’s disability-access commission and the American School for the Deaf corroborate recurring April 15 National ASL Day and the school’s April 15, 1817 opening; this is not an automa…