International Day of the Tropics
A/RES/70/267
A/RES/70/267
This authority record treats the observance as a fixed annual date. The same month and day can be reused unless a stronger source changes the rule. Public-holiday or government status is never inferred from the observance name alone.
Overview
International Day of the Tropics is observed on 29 June. The UN General Assembly designated the day through resolution A/RES/70/267 on 14 June 2016.
The day focuses attention on the environmental, social, economic and demographic importance of the tropical region, including both its extraordinary diversity and the development challenges faced across tropical countries and communities.
Why it matters
The Tropics stretch broadly between the Tropic of Cancer and the Tropic of Capricorn. The observance encourages people to examine tropical issues as connected global questions rather than as isolated local concerns.
UN material links the day to sustainable development and to better understanding of challenges such as climate change, deforestation, urbanization, health, infrastructure, biodiversity loss and demographic change.
History
A consortium of twelve leading tropical research institutions launched the inaugural State of the Tropics Report on 29 June 2014.
Australia led the effort in the General Assembly and introduced the multinational draft A/70/L.53. On 14 June 2016, the Assembly adopted A/RES/70/267 without a vote.
The inaugural International Day of the Tropics was celebrated on 29 June 2016, exactly two years after the report launch.
How the observance developed
This timeline is assembled only from verified provenance fields. Missing stages are omitted rather than inferred.
Australia, leading a broad multinational sponsor group
UN meetings coverage records the representative of Australia introducing the resolution; A/70/L.53 and its addendum document the wide sponsor group.
United Nations General Assembly
UN General Assembly resolution A/RES/70/267
First documented observance
James Cook University’s State of the Tropics material identifies 29 June 2016 as the inaugural/first International Day, consistent with the General Assembly meeting record.
What the evidence establishes
Verified institutional roles and milestones are shown first. Fields that the reviewed sources do not establish remain fail-closed and are available below without competing with the confirmed record.
3 fields not established in reviewed sources
Ways to observe
Use reliable regional data to compare one environmental and one social indicator across several tropical countries without treating the Tropics as a single homogeneous region.
Map how a tropical issue such as coastal risk, heat, biodiversity or food systems connects local decisions with global supply chains and climate pressures.
Read a State of the Tropics resource alongside a current UN or scientific source and identify which trends have changed since the original report.
Highlight tropical research institutions, Indigenous knowledge holders and local organizations rather than presenting outside observers as the sole source of expertise.
Useful facts
The observance falls on 29 June.
A/RES/70/267 was adopted on 14 June 2016.
Australia introduced the draft resolution in the General Assembly on behalf of a broad multinational sponsor group.
The first International Day of the Tropics was celebrated on 29 June 2016.
The date marks the anniversary of the inaugural State of the Tropics Report launched on 29 June 2014.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
Evidence & sources
Repeated links from the authority record, institutional provenance and editorial guide research are consolidated here. Badges show how each source is used; a contextual source is never treated as proof of establishment on its own.
United Nations Digital Library — A/70/L.53 (opens in a new tab)
United Nations Digital Library — A/RES/70/267 (opens in a new tab)
United Nations Meetings Coverage — General Assembly adoption and Australian introduction (opens in a new tab)
James Cook University / State of the Tropics — inaugural 2016 observance (opens in a new tab)
United Nations — International Day of the Tropics (opens in a new tab)
United Nations — List of International Days and Weeks (opens in a new tab)
United Nations — Observances: who chooses them and how (opens in a new tab)
Understand it, compare it, then explore further
Start with the most common factual questions, then use reviewed distinctions and related authority records to understand where this observance fits.
Frequently asked questions
When is International Day of the Tropics?
29 June The stored recurrence guidance is: 29 June.
Does International Day of the Tropics fall on the same date every year?
The authority record classifies it as fixed annual, so its month and day are reusable unless stronger evidence changes the rule.
Is International Day of the Tropics an official public holiday?
The authority record verifies it within this scope: United Nations / international observance. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when the supporting authority record explicitly does so.
Who established or recognizes International Day of the Tropics?
The reviewed provenance layer identifies United Nations General Assembly as the proclaiming or establishing body. The proposer or originator is recorded separately as Australia, leading a broad multinational sponsor group.
Is International Day of the Tropics international or country-specific?
The record has international or global institutional scope: United Nations / international observance. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual layer is source-backed and keeps its date rule, scope, provenance and editorial guardrails attached to the authority record. This record was checked on 2026-09-05.
Why is International Day of the Tropics on 29 June?
The UN observance page says the date marks the anniversary of the launch of the inaugural State of the Tropics Report on 29 June 2014.
When was the first International Day of the Tropics?
The inaugural observance was celebrated on 29 June 2016, shortly after the General Assembly adopted the establishing resolution.
Who proposed the UN day?
Australia introduced the resolution in the General Assembly, while A/70/L.53 lists a broad multinational group of sponsors and later additional sponsors.
Other observances on June 29
These records also resolve to June 29, 2027 under the current authority data.
International Mud Day
World Forum Foundation / Nature Action Collaborative for Children
National Bacon Burnt End Day
Heim Barbecue’s founders tie National Bacon Burnt End Day to June 29, commemorating their June 29, 2013 pop-up; current reporting identifies the first declared observance in 2019.
National Waffle Iron Day
Independent observance calendars identify June 29 as National Waffle Iron Day.
San Francisco’s official birthday anniversary
National Park Service historical documentation states that 29 June 1776 marked the first Mass associated with the settlement and that 29 June remains San Francisco’s official birthday.
Solemnity of Saints Peter and Paul, Apostles
Vatican News identifies 29 June as the solemnity of Saints Peter and Paul; the 2026 Vatican liturgical page confirms the same date.
World Industrial Design Day
World Design Organization (WDO)