The Calendar hole will go live in approximately 8 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 KatieLG-Transpiler 🇬🇧 469 838 10ms 2 Sep 2023 482nd weliveinhell 🇭🇹 468 543 3ms 6 Jan 2024 483rd emgordon154 466 156 60ms 21 Nov 2025 484th Flekay 🇩🇪 465 263 10ms 11 Jul 2025 485th jtaxen 461 265 39ms 14 May 2024 486th YAJUE114514 459 266 362ms 9 days ago 487th emgordon154 459 494 100ms 14 days ago 488th weliveinhell 🇭🇹 456 202 63ms 6 Jan 2024 489th yuchuehw 454 269 10ms 26 Jan 2024 489th inverseLorentz 🇦🇺 454 269 15ms 20 Feb 2024 491st Natanaelel 🇸🇪 450 162 35ms 28 Nov 2023 492nd alemelis 448 273 576ms 9 Sep 2024 492nd hiichbindermax 448 273 9ms 13 Feb 2025 494th una-ada 🇺🇸 448 294 9ms 5 Sep 2023 495th GolfingSuccess 🇬🇷 447 167 2ms 1 Sep 2023 496th aaronze 🇦🇺 445 240 45ms 22 Sep 2023 497th IISResetMe 442 250 396ms 24 Nov 2025 498th AdrienHache 🇫🇷 439 520 77ms 22 Feb 2024 499th GolfingSuccess 🇬🇷 434 466 4ms 19 Aug 2024 500th Yewzir 🇧🇪 431 317 368ms 17 Oct 2024 501st blaztoma 🇱🇹 430 121 51ms 19 Oct 2025 502nd HumanoidCPU 427 773 3ms 12 Dec 2024 502nd dokutan 427 773 3ms 12 Dec 2024 502nd KatieLG 🇬🇧 427 773 3ms 3 Jan 2025 502nd Shanethegamer 🇺🇸 427 773 3ms 11 Jan 2025 502nd BREMAUCY 🇫🇷 427 773 3ms 14 Jan 2025 502nd CaedenHarper 🇨🇦 427 773 3ms 22 Jan 2025 502nd JOrE20 🇺🇸 427 773 3ms 22 days ago 509th emgordon154 425 476 4ms 30 Aug 2024 510th ZakkkkAttackkkk 🇵🇭 422 177 2ms 24 Feb 2025 511th snyderek 🇺🇸 421 228 79ms 4 Feb 2025 512th msbranicky 421 932 11ms 19 Sep 2023 513th bobbysq 420 291 10ms 20 May 2024 514th Yewzir 🇧🇪 419 459 6ms 4 Apr 2024 515th madex 🇩🇪 418 327 401ms 3 May 2025 516th brimstonetrader 416 294 97ms 10 Jan 2024 517th KatieLG-Transpiler 🇬🇧 413 802 2ms 2 Sep 2023 518th Natanaelel 🇸🇪 411 465 153ms 9 Jun 2025 519th typeswitch-dev 🇵🇹 410 571 4ms 1 Sep 2023 520th ndren 409 127 54ms 17 Jun 2024 521st jerrandolph 408 356 263ms 22 Sep 2025 522nd Yewzir 🇧🇪 407 236 530ms 27 Jan 2024 523rd jacobly0 🇺🇸 400 187 3ms 1 Sep 2023 524th janbehrens 🇩🇪 399 241 70ms 30 Dec 2023 525th tomh1012 396 345 421ms 10 Nov 2025 526th error256 396 544 16ms 31 May 2024 526th dokutan 396 544 15ms 8 Apr 2025 528th dokutan 396 577 64ms 10 days ago 529th hellwue 393 311 17ms 10 Sep 2024 530th weliveinhell 🇭🇹 391 550 15ms 6 Jan 2024 531st msbranicky 389 848 6ms 13 Jan 2025 532nd MeWhenI 🇻🇦 388 561 2ms 1 Sep 2023 533rd madex 🇩🇪 386 218 1,034ms 3 Jul 2024 534th jared-hughes 385 194 2ms 7 Sep 2023 535th dokutan 384 591 96ms 10 days ago 536th bac0id 381 252 2,955ms 8 Jan 2025 537th aksyristos 381 321 13ms 11 Sep 2023 538th nyoshe 379 197 2ms 19 Sep 2023 539th msbranicky 368 591 2ms 1 Sep 2023 540th msbranicky 366 625 82ms 1 Sep 2023 541st MeWhenI 🇻🇦 362 559 3ms 16 Aug 2024 542nd elgan65536 361 207 2ms 7 Apr 2024 542nd madex 🇩🇪 361 207 2ms 3 Jul 2024 542nd luuumine 🇫🇷 361 207 2ms 27 days ago 545th emplv 🇱🇻 356 259 57ms 20 Oct 2023 546th dokutan 356 568 4ms 12 Aug 2024 547th RaBa21 🇭🇺 355 344 20ms 1 Aug 2025 548th Natanaelel 🇸🇪 352 212 1ms 4 Sep 2023 548th iczelia 🇩🇪 352 212 1ms 17 Oct 2025 550th rak1507 🇬🇧 352 347 49ms 1 Sep 2023 551st Ripick 351 343 285ms 14 Jul 2024 552nd MichalMarsalek 🇨🇿 351 1,448 5ms 1 Sep 2023 553rd CaedenHarper 🇨🇦 348 215 3ms 30 Jan 2025 554th MeWhenI 🇻🇦 347 578 29ms 6 Sep 2023 555th logvp 343 218 1ms 1 Feb 2024 556th MeWhenI 🇻🇦 343 492 41ms 30 Aug 2024 557th Yewzir 🇧🇪 341 219 2ms 7 Nov 2023 558th dokutan 338 568 6ms 5 Jun 2024 559th janbehrens 🇩🇪 337 222 1ms 30 Dec 2023 560th LostSyntax21 🇬🇧 337 363 33ms 23 Oct 2025 First Prev 481–560 of 1,370 Next Last