International Sudoku Day, observed every September 9th, is a tribute to the enthralling logic-based puzzle, Sudoku. This special day unites enthusiasts globally, allowing them to revel in the intricacies of this captivating number game.

Tracing Sudoku’s Roots

Contrary to popular belief that Sudoku originated from ancient Asia, it’s a relatively recent brainchild. The game’s ancestor, Latin Squares, was the brainchild of Leonhard Euler, a Swiss mathematician from the late 1700s. Fast forward to the modern era, and Howard Garns from Indiana breathed life into the game we recognize today. He introduced it as “Number Place” in 1979, capturing the attention of puzzle aficionados in the magazine “Dell Pencil Puzzles and Word Games.”

By the mid-1980s, this intriguing game found its way to Japan. Here, it was christened “Sudoku,” a name hinting at its unique rule: “the numbers must be solitary.” Given the complexity of creating crossword puzzles in Japanese, Sudoku, with its simple numeric structure, became a sensation. The game’s allure was so strong that Japanese enthusiasts snapped up hundreds of thousands of Sudoku magazines every month.

The global Sudoku wave can be credited to Wayne Gould, a judge from New Zealand. During a Tokyo trip in 1997, he stumbled upon this number puzzle. Recognizing its potential, he reintroduced it to the Western audience. By 2004, renowned newspapers, including the Times of London, were featuring Sudoku puzzles, marking its ascent as a global pastime.

In 2013, recognizing its widespread appeal, the World Puzzle Federation declared September 9th as the official International Sudoku Day, a nod to the game’s 9×9 grid.

Mastering the Game

At its core, Sudoku is a game of logic played on a grid, segmented into smaller grids. The aim? Populate each row, column, and mini grid with numbers from 1 to 9. The catch? No number should appear more than once in any row, column, or grid. While some numbers are provided to kickstart the game, the real challenge lies in deducing the missing ones using pure logic.

Embracing the Sudoku Spirit

  1. Dive into Puzzles: Whether you’re just starting out or have been solving Sudoku for years, there’s always a new puzzle waiting. Grab your favorite Sudoku book or app and immerse yourself in the world of numbers.
  2. Friendly Face-offs: Why solve alone when you can make it a friendly competition? Challenge a buddy and see who emerges as the Sudoku champion.
  3. Gift the Joy of Sudoku: Spread the love for Sudoku. Gift a puzzle book to a loved one and introduce them to this mesmerizing world.
  4. Sudoku On-the-Go: For those always on the move, Sudoku apps are a blessing. Dive into a game whenever you wish, right from your smartphone.
  5. Join a Sudoku Club: Many communities have Sudoku clubs where enthusiasts meet, share strategies, and solve puzzles together. It’s a great way to socialize while indulging in your favorite pastime.
  6. Participate in Tournaments: Test your skills by entering Sudoku tournaments. Not only will you challenge yourself, but you’ll also get to meet other Sudoku aficionados.
  7. Teach the Younger Generation: Share your passion for Sudoku with kids. Teaching them the basics can be a rewarding experience and a great way to sharpen their logical thinking.
  8. Create Your Own Puzzles: Once you’ve mastered the art of solving, try your hand at creating your own Sudoku puzzles. It’s a unique challenge that will give you a deeper appreciation for the game.
  9. Sudoku Retreats: Believe it or not, there are retreats dedicated to Sudoku enthusiasts. Consider joining one for a weekend of relaxation, fun, and of course, Sudoku!

Why Sudoku is More Than Just a Game

Engaging in Sudoku is not just about fun; it’s a mental workout. While it might not turn you into Einstein, it keeps your brain agile and young. Regular Sudoku sessions can be a shield against age-related cognitive issues like dementia. Beyond the mental benefits, completing a Sudoku grid brings a sense of achievement, making you feel victorious.

Let’s Play!

You can play Sudoku in our games section.


International Sudoku Day is more than a day — it’s a celebration of order, logic, and the joy of solving. Whether you’re a seasoned solver or someone just starting their Sudoku journey, this day is a golden opportunity to dive deep into the world of numbers and patterns.


Why is International Sudoku Day celebrated?

The World Puzzle Federation, in 2013, designated September 9th as International Sudoku Day. This date was chosen in homage to the game’s 9×9 numerical grid structure.

Which country invented Sudoku?

Japan is credited with introducing the world to Sudoku. The game made its debut there in 1984, adopting the name “Sudoku.” This term is a shorthand for the Japanese expression “Sūji wa dokushin ni kagiru,” emphasizing that each digit should appear only once.

Why is it called Sudoku?

“Sudoku” is derived from the Japanese phrase “suuji wa dokushin ni kagiru”, translating to “the numbers must remain single.” Today, Sudoku puzzles have gained global popularity, often found alongside crossword puzzles in various publications.

What is hardest Sudoku?

Expert Sudoku stands out as a game tailored for seasoned Sudoku enthusiasts, boasting an exceptionally high difficulty level. The defining feature of this challenging version is the sparse number of digits pre-filled in the 9×9 Sudoku grid, which is further divided into 3×3 cells.

Reviewed by HolidayToday Staff

Alex’s Take on

I’ve never been a big fan of Sudoku. Perhaps it feels a bit too challenging for my taste. However, there’s something about the atmosphere of this holiday that genuinely appeals to me. It’s intriguing to see so many people come together, sharing a passion for something I’ve yet to fully grasp.

Categorized in: