International Sudoku Day
Logic Masters India records the World Puzzle Federation’s announcement of 9/9 as International Sudoku Day; an institute under Turkmenistan’s Ministry of Foreign Affairs independently records the same designation and date.
Date and recurrence
9 September annually
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 puzzle-community observance. 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
- Logic Masters India — Sudoku Day testNational Puzzle Body
- Institute of International Relations, Ministry of Foreign Affairs of Turkmenistan — International Sudoku DayGovernment Institute
Frequently asked questions
When is International Sudoku Day?
9 September annually The stored recurrence guidance is: 9 September.
Does International Sudoku 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 Sudoku Day an official public holiday?
The authority record verifies it within this scope: International puzzle-community 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 Sudoku Day?
The stored designation basis is: Logic Masters India records the World Puzzle Federation’s announcement of 9/9 as International Sudoku Day; an institute under Turkmenistan’s Ministry of Foreign Affairs independently records the same designation and date.. Supporting provenance includes Logic Masters India — Sudoku Day test. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is International Sudoku Day international or country-specific?
The record has international or global institutional scope: International puzzle-community 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 2026-09-07.
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