World Tessellation Day
Created by author and educator Emily Grosvenor in 2016; corroborated by mathematics/science organizations
Date and recurrence
17 June
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.
Scope and status
The verified scope stored for this record is international mathematics, art and pattern-making celebration. The site preserves that boundary and does not infer broader government, global or public-holiday status from the observance name alone.
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.
Sources
- Creator guest post — World Tessellation DayCreator Source
- American Mathematical Society blog — World Tessellation DayProfessional Corroboration
Frequently asked questions
When is World Tessellation Day?
17 June The stored recurrence guidance is: 17 June.
Does World Tessellation 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 World Tessellation Day an official public holiday?
The authority record verifies it within this scope: international mathematics, art and pattern-making celebration. 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 World Tessellation Day?
The stored designation basis is: Created by author and educator Emily Grosvenor in 2016; corroborated by mathematics/science organizations. Supporting provenance includes Creator guest post — World Tessellation Day. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is World Tessellation Day international or country-specific?
The record has international or global institutional scope: international mathematics, art and pattern-making celebration. 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.
Other observances on June 17
These records also resolve to June 17, 2027 under the current authority data.
Bunker Hill Day
Massachusetts General Laws include Bunker Hill Day on 17 June as a legal holiday with respect to Suffolk County only, while also specifying that public agencies remain open.
National Apple Strudel Day
National Day Calendar and National Today independently place National Apple Strudel Day on June 17 each year.
National Day of Iceland
The Government of Iceland identifies 17 June as National Day in its national-flag guidance and official prime-ministerial National Day material.
National Mascot Day
Major League Baseball reported the Mascot Hall of Fame’s 2025 class announcement on National Mascot Day, June 17, verifying the established event identity in the sports-mascot community.
National Stewart’s Root Beer Day
National Today gives National Stewart’s Root Beer Day a fixed June 17 recurrence, and EventGuide independently lists it as an every-June-17 observance.
Paso a la Inmortalidad del General Don Martín Miguel de Güemes
Argentina’s Law 27,258 establishes 17 June each year as a national holiday commemorating the passing to immortality of General Don Martín Miguel de Güemes.