International Asteroid Day
A/RES/71/90
A/RES/71/90
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 Asteroid Day is observed on 30 June to raise awareness of asteroid-impact hazards and international work related to near-Earth objects.
The observance is educational and preparedness-oriented. It should not be used to amplify unsupported impact predictions, sensational claims or unofficial emergency instructions.
Why it matters
Near-Earth-object monitoring combines astronomy, observation networks, orbit calculation, risk communication and international coordination. Public understanding benefits from distinguishing a detected object from a credible impact threat.
Current risk assessments can change as observations improve, so live hazard claims should come from competent space agencies and recognized monitoring systems rather than evergreen observance copy.
History
In December 2016, the General Assembly adopted resolution A/RES/71/90 declaring 30 June International Asteroid Day.
The United Nations states that 30 June was chosen to mark the anniversary of the Tunguska impact over Siberia on 30 June 1908.
How the observance developed
This timeline is assembled only from verified provenance fields. Missing stages are omitted rather than inferred.
United Nations General Assembly
UN General Assembly resolution A/RES/71/90
First documented observance
United Nations material identifies 30 June 2017 as the first International Asteroid Day following the General Assembly designation.
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.
4 fields not established in reviewed sources
Ways to observe
Explore how astronomers detect and track near-Earth objects using a recognized space-agency resource.
Learn what changes when additional observations refine an asteroid’s orbit.
Compare planetary defence with human spaceflight so the two topics are not treated as the same field.
Use reputable observatories, space agencies or UN space resources when discussing current risk.
Avoid sharing alarming impact claims without a current authoritative source.
Useful facts
International Asteroid Day is observed on 30 June.
The UN General Assembly established it through A/RES/71/90 in 2016.
30 June marks the anniversary of the 1908 Tunguska impact.
The day focuses on asteroid-impact awareness and near-Earth-object preparedness.
Current risk assessments are time-sensitive and should not be frozen into evergreen copy.
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/RES/71/90 (opens in a new tab)
United Nations — International Asteroid Day (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 Asteroid Day?
30 June The stored recurrence guidance is: 30 June.
Does International Asteroid Day 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 Asteroid Day 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 Asteroid Day?
The reviewed provenance layer identifies United Nations General Assembly as the proclaiming or establishing body.
Is International Asteroid Day 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 Asteroid Day on 30 June?
The United Nations chose 30 June to mark the anniversary of the Tunguska impact over Siberia on 30 June 1908.
Does Asteroid Day mean a specific asteroid is expected to hit Earth?
No. The observance is about awareness and preparedness; any current impact-risk claim must be checked against competent, up-to-date monitoring sources.
Which resolution established the day?
The UN General Assembly established International Asteroid Day through resolution A/RES/71/90 in 2016.
How this differs from closely related observances
These distinctions are separately reviewed and source-backed. They clarify scope; they do not change either authority record.
Is International Asteroid Day the same as International Day of Human Space Flight?
International Asteroid Day on 30 June focuses on asteroid-impact hazards, near-Earth objects and planetary-defence awareness. The International Day of Human Space Flight on 12 April commemorates the beginning of human spaceflight and the use of outer space for peaceful purposes.
Open International Day of Human Space Flight →Distinction sources
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These records also resolve to June 30, 2027 under the current authority data.
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