The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Rijndael S-box in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 481st emgordon154 466 156 60ms 21 Nov 2025 482nd Flekay 🇩🇪 465 263 10ms 11 Jul 2025 483rd TheZwierzLF 🇵🇱 461 232 37ms 101 mins ago 484th jtaxen 461 265 39ms 14 May 2024 485th YAJUE114514 459 266 362ms 7 days ago 486th emgordon154 459 494 100ms 12 days ago 487th weliveinhell 🇭🇹 456 202 63ms 6 Jan 2024 488th yuchuehw 454 269 10ms 26 Jan 2024 488th inverseLorentz 🇦🇺 454 269 15ms 20 Feb 2024 490th Natanaelel 🇸🇪 450 162 35ms 28 Nov 2023 491st alemelis 448 273 576ms 9 Sep 2024 491st hiichbindermax 448 273 9ms 13 Feb 2025 493rd una-ada 🇺🇸 448 294 9ms 5 Sep 2023 494th GolfingSuccess 🇬🇷 447 167 2ms 1 Sep 2023 495th aaronze 🇦🇺 445 240 45ms 22 Sep 2023 496th IISResetMe 442 250 396ms 26 days ago 497th AdrienHache 🇫🇷 439 520 77ms 22 Feb 2024 498th GolfingSuccess 🇬🇷 434 466 4ms 19 Aug 2024 499th Yewzir 🇧🇪 431 317 368ms 17 Oct 2024 500th blaztoma 🇱🇹 430 121 51ms 19 Oct 2025 501st HumanoidCPU 427 773 3ms 12 Dec 2024 501st dokutan 427 773 3ms 12 Dec 2024 501st KatieLG 🇬🇧 427 773 3ms 3 Jan 2025 501st Shanethegamer 🇺🇸 427 773 3ms 11 Jan 2025 501st BREMAUCY 🇫🇷 427 773 3ms 14 Jan 2025 501st CaedenHarper 🇨🇦 427 773 3ms 22 Jan 2025 501st JOrE20 🇺🇸 427 773 3ms 20 days ago 508th emgordon154 425 476 4ms 30 Aug 2024 509th ZakkkkAttackkkk 🇵🇭 422 177 2ms 24 Feb 2025 510th snyderek 🇺🇸 421 228 79ms 4 Feb 2025 511th msbranicky 421 932 11ms 19 Sep 2023 512th bobbysq 420 291 10ms 20 May 2024 513th Yewzir 🇧🇪 419 459 6ms 4 Apr 2024 514th madex 🇩🇪 418 327 401ms 3 May 2025 515th brimstonetrader 416 294 97ms 10 Jan 2024 516th KatieLG-Transpiler 🇬🇧 413 802 2ms 2 Sep 2023 517th Natanaelel 🇸🇪 411 465 153ms 9 Jun 2025 518th typeswitch-dev 🇵🇹 410 571 4ms 1 Sep 2023 519th ndren 409 127 54ms 17 Jun 2024 520th jerrandolph 408 356 263ms 22 Sep 2025 521st Yewzir 🇧🇪 407 236 530ms 27 Jan 2024 522nd jacobly0 🇺🇸 400 187 3ms 1 Sep 2023 523rd janbehrens 🇩🇪 399 241 70ms 30 Dec 2023 524th tomh1012 396 345 421ms 10 Nov 2025 525th error256 396 544 16ms 31 May 2024 525th dokutan 396 544 15ms 8 Apr 2025 527th dokutan 396 577 64ms 9 days ago 528th hellwue 393 311 17ms 10 Sep 2024 529th weliveinhell 🇭🇹 391 550 15ms 6 Jan 2024 530th msbranicky 389 848 6ms 13 Jan 2025 531st MeWhenI 🇻🇦 388 561 2ms 1 Sep 2023 532nd madex 🇩🇪 386 218 1,034ms 3 Jul 2024 533rd jared-hughes 385 194 2ms 7 Sep 2023 534th dokutan 384 591 96ms 9 days ago 535th bac0id 381 252 2,955ms 8 Jan 2025 536th aksyristos 381 321 13ms 11 Sep 2023 537th nyoshe 379 197 2ms 19 Sep 2023 538th msbranicky 368 591 2ms 1 Sep 2023 539th msbranicky 366 625 82ms 1 Sep 2023 540th MeWhenI 🇻🇦 362 559 3ms 16 Aug 2024 541st elgan65536 361 207 2ms 7 Apr 2024 541st madex 🇩🇪 361 207 2ms 3 Jul 2024 541st luuumine 🇫🇷 361 207 2ms 25 days ago 544th emplv 🇱🇻 356 259 57ms 20 Oct 2023 545th dokutan 356 568 4ms 12 Aug 2024 546th RaBa21 🇭🇺 355 344 20ms 1 Aug 2025 547th Natanaelel 🇸🇪 352 212 1ms 4 Sep 2023 547th iczelia 🇩🇪 352 212 1ms 17 Oct 2025 549th rak1507 🇬🇧 352 347 49ms 1 Sep 2023 550th Ripick 351 343 285ms 14 Jul 2024 551st MichalMarsalek 🇨🇿 351 1,448 5ms 1 Sep 2023 552nd CaedenHarper 🇨🇦 348 215 3ms 30 Jan 2025 553rd MeWhenI 🇻🇦 347 578 29ms 6 Sep 2023 554th logvp 343 218 1ms 1 Feb 2024 555th MeWhenI 🇻🇦 343 492 41ms 30 Aug 2024 556th Yewzir 🇧🇪 341 219 2ms 7 Nov 2023 557th dokutan 338 568 6ms 5 Jun 2024 558th janbehrens 🇩🇪 337 222 1ms 30 Dec 2023 559th LostSyntax21 🇬🇧 337 363 33ms 23 Oct 2025 560th dokutan 337 580 3ms 18 days ago First Prev 481–560 of 1,369 Next Last