267 briefs · 48 iconic · 5 categories · 55 countries

Every brief, one library.

One page per holiday, festival, or public day. Each brief covers origins, dates, customs, legal status, and where it is contested — then links the primary sources.

Briefs

267

Across the year

Iconic

48

Flagship briefs

Categories

5

Civil, religious, cultural, international

Countries

55

And growing

Today

Friday, October 23, 2026

No federal or major public holiday observed today across tracked regions.

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Library at a glance

267 briefs · 48 iconic · 5 categories · 55 countries

Month: Dec

Showing 19 briefs in Dec.

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Federal holiday(2)

Civic memorial(1)

Cultural celebration(3)

Religious observance(5)

Iconic
Dec

Christmas - December 25, federal holiday, religious origins, and how it is observed

Christmas on December 25 is a US federal holiday and a Christian religious feast marking the birth of Jesus. One of 11 federal holidays under 5 U.S.C. 6103. Observed with religious services, family gatherings, gift exchange, and seasonal displays.

USGBCADE
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Iconic
Jan - Dec

Galungan - the Balinese day of dharma's return, and the 210-day pawukon cycle

Galungan is the Balinese Hindu festival marking the return of dharma after Bhatara Guru's descent into the underworld. It always falls on a Wednesday and recurs on a 210-day pawukon cycle, so Bali sees it roughly twice a Gregorian year.

ID
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Iconic
Nov - Dec

Hanukkah - the 8-day Jewish festival of lights on 25 Kislev, and how it is observed

Hanukkah is the 8-day Jewish festival of lights on 25 Kislev in the Hebrew calendar, commemorating the rededication of the Second Temple in Jerusalem in 164 BCE and the miracle of the oil. Public holiday in Israel; widely observed across US Jewish communities.

USIL
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Iconic
Dec

Immaculate Conception (Immacolata Concezione / Inmaculada Concepción) - December 8, the Catholic dogma of Mary’s preservation from original sin

The Immaculate Conception on December 8 is a Catholic solemnity observing the dogma that the Virgin Mary was preserved from original sin from the moment of her conception. The day is a national public holiday in Italy, Spain, Portugal, and Austria, and the principal Marian feast of the Catholic liturgical calendar.

ITESPTBR
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Iconic
Dec

Our Lady of Guadalupe in Mexico (Nuestra Señora de Guadalupe) - December 12, the 1531 apparition of the Virgin of Tepeyac

Our Lady of Guadalupe (Nuestra Señora de Guadalupe) on December 12 is the patronal feast of Mexico, commemorating the 1531 apparition of the Virgin Mary to Juan Diego on the hill of Tepeyac near Mexico City. The day is one of the most-searched religious observances in Latin America and draws an estimated 8-10 million pilgrims to the Basilica of Guadalupe each year.

MXUS
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International observance(8)

Nov - Dec

Giving Tuesday - the Tuesday after US Thanksgiving, and how the giving-day movement spread

Giving Tuesday on the Tuesday after US Thanksgiving (Nov 24, 2026) is an international day of charitable giving, founded in 2012 by the 92nd Street Y and the United Nations Foundation. Observed in the United States, Canada, the UK, and 60+ countries. Not a federal holiday.

USCAGBAU
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Dec

New Years Eve - December 31, countdown, fireworks, and how the world rings in the new year

New Years Eve on December 31 is the night before the Gregorian New Year, observed globally with midnight countdown, fireworks, family gatherings, and large public celebrations. Not a federal holiday in itself, but a major cultural and commercial event.

USGBCADE
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Dec

World Soil Day - December 5, the UN observance of soils, food security, and the 2024 African Decade

World Soil Day on December 5 is the UN-recognised annual observance of soil health, food security, and sustainable land management. Established by the UN General Assembly in 2014. Anchors the Global Soil Partnership and the African Fertilizer and Soil Health Action Plan (2024).

UN
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Dec

Human Rights Day - December 10, the UN day marking the 1948 Universal Declaration

Human Rights Day on December 10 commemorates the adoption of the Universal Declaration of Human Rights by the UN General Assembly in 1948. Recognized annually by the United Nations and over 100 countries. Not a public holiday in most countries, though it is a public holiday in South Africa.

UN
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Dec

International Migrants Day - December 18, UN observance since 1990

International Migrants Day on December 18 is a United Nations observance established in 1990 to mark the adoption of the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families. Not a public holiday.

UN
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Dec

International Mountain Day - December 11, the UN day raising awareness of mountain ecosystems

International Mountain Day on December 11 is a UN-recognised day established by UN General Assembly Resolution 57/245 in 2002. First observed in 2003. Raises awareness of the importance of mountain ecosystems, the role of mountains in sustainable development, and the challenges faced by mountain dwellers.

UN
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Dec

International Volunteer Day - December 5, UN observance celebrating volunteer work since 1985

International Volunteer Day on December 5 is a United Nations observance established in 1985 to recognise the contribution of volunteers to society. Each year the UN Volunteers programme publishes a flagship report. Not a public holiday.

UN
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Dec

World AIDS Day - December 1, the WHO observance on HIV awareness

World AIDS Day on December 1 is the WHO annual observance of HIV prevention, treatment, and stigma reduction. Established by the World Health Organization in 1988, it is one of the longest-running international health awareness days. Not a public holiday.

UN
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