The Calendar hole will go live in approximately 11 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 161st inventshah 812 92 2ms 3 Sep 2023 161st KasperKivimaeki 🇫🇮 812 92 2ms 28 Oct 2025 163rd primo-ppcg 🇹🇭 811 206 5ms 3 Sep 2023 164th emplv 🇱🇻 810 155 137ms 19 Oct 2025 165th Natanaelel 🇸🇪 809 132 58ms 10 Sep 2023 166th GrayJoKing 🇦🇺 809 151 25ms 15 Nov 2023 167th sisyphus-ppcg 🇦🇺 809 163 9ms 1 Sep 2023 167th Steffan153 🇫🇮 809 163 8ms 19 Oct 2023 169th MostParsingVex 808 119 79ms 13 Oct 2024 170th SirBogman 🇺🇸 807 237 190ms 27 Sep 2023 171st MostParsingVex 807 270 21ms 25 Oct 2024 172nd sean-niemann 🇺🇸 804 148 792ms 25 Oct 2025 173rd Seek64 🇩🇪 804 152 22ms 5 Jun 2024 174th ovs-code 🇩🇪 801 131 457ms 7 Sep 2023 175th SirBogman 🇺🇸 800 251 31ms 23 Sep 2023 176th SirBogman 🇺🇸 799 153 17ms 21 Sep 2023 177th kg583 🇺🇸 799 209 29ms 10 Oct 2025 178th Steffan153 🇫🇮 797 241 41ms 20 Jul 2024 179th SirBogman 🇺🇸 796 121 657ms 23 Sep 2023 180th emplv 🇱🇻 796 208 98ms 20 Oct 2023 181st MostParsingVex 795 94 2ms 20 Jan 2025 182nd MeWhenI 🇻🇦 794 154 40ms 1 Sep 2023 183rd trinityy-7 794 166 9ms 10 Oct 2023 184th inventshah 793 148 123ms 3 Sep 2023 185th ovs-code 🇩🇪 791 92 57ms 1 Sep 2023 185th MeWhenI 🇻🇦 791 92 235ms 1 Sep 2023 187th sisyphus-ppcg 🇦🇺 789 155 12ms 3 days ago 188th ovs-code 🇩🇪 788 66 47ms 4 Sep 2023 188th lynn 788 66 51ms 7 Jul 2024 190th SirBogman 🇺🇸 784 91 3ms 26 Sep 2023 191st SirBogman 🇺🇸 783 93 34ms 25 Sep 2023 192nd SirBogman 🇺🇸 782 93 214ms 10 Sep 2023 193rd edsrzf 🇳🇿 781 235 8ms 10 days ago 194th CatsAreFluffy 778 96 2ms 16 Feb 2024 195th lifthrasiir 🇰🇷 775 170 10ms 23 Nov 2024 196th ovs-code 🇩🇪 775 189 466ms 3 Oct 2025 197th AdrienHache 🇫🇷 774 143 224ms 2 Jan 2024 198th inventshah 774 158 17ms 3 Sep 2023 199th bricknellj 769 159 163ms 23 Apr 2025 200th GolfingSuccess 🇬🇷 769 163 511ms 15 Jan 2024 201st bstrat 767 93 3ms 23 Aug 2024 202nd weliveinhell 🇭🇹 766 284 2ms 15 Jan 2024 203rd KasperKivimaeki 🇫🇮 765 68 53ms 22 Apr 2025 204th anter69 🇭🇺 764 160 10ms 19 Nov 2023 204th ryyyn 🇺🇸 764 160 23ms 9 days ago 206th xsot 🇸🇬 762 174 12ms 21 Jun 2025 207th SirBogman 🇺🇸 759 180 384ms 27 Sep 2023 208th anter69 🇭🇺 757 141 33ms 14 days ago 209th MeWhenI 🇻🇦 756 259 650ms 5 Oct 2023 210th snoozingnewt 🇨🇦 754 260 119ms 20 Nov 2025 211th dmrichwa 🇺🇸 753 175 8ms 4 Sep 2023 212th emplv 🇱🇻 752 193 264ms 20 Oct 2023 213th neel11235813 751 167 564ms 1 Mar 2024 214th MeWhenI 🇻🇦 751 195 613ms 7 Nov 2025 215th GolfingSuccess 🇬🇷 750 163 21ms 1 Sep 2023 216th error256 746 164 367ms 8 Sep 2024 217th weliveinhell 🇭🇹 742 184 334ms 27 Sep 2023 218th lukegustafson 🇺🇸 736 179 9ms 13 Dec 2023 219th Alex-x90 🇺🇸 734 160 114ms 9 Jan 2025 220th lifthrasiir 🇰🇷 732 71 49ms 26 Nov 2024 221st rucin93 🇵🇱 732 180 11ms 18 Mar 2025 222nd stefangimmillaro 730 187 393ms 20 Jun 2025 223rd SirBogman 🇺🇸 728 132 63ms 5 Mar 2024 224th ovs-code 🇩🇪 728 168 284ms 12 May 2024 225th neel11235813 727 168 12ms 29 Nov 2023 226th pardouin 🇫🇷 725 215 4,319ms 10 Aug 2025 227th Irratix 🇳🇱 724 182 9ms 28 Sep 2023 228th davitf 723 169 30ms 30 Apr 2024 229th stefangimmillaro 723 229 101ms 9 Sep 2023 230th inventshah 722 72 51ms 4 Sep 2023 230th Steffan153 🇫🇮 722 72 49ms 16 Feb 2024 232nd ndren 719 170 16ms 9 Oct 2025 232nd blaztoma 🇱🇹 719 170 44ms 13 Nov 2025 234th SirBogman 🇺🇸 718 547 15ms 27 Sep 2023 235th emgordon154 712 105 2ms 27 Sep 2025 236th jared-hughes 712 185 9ms 7 Sep 2023 236th stefangimmillaro 712 185 12ms 30 Sep 2024 238th CornerMercury 🇬🇧 711 172 54ms 24 days ago 239th adriweb 🇫🇷 711 206 1ms 1 Sep 2023 239th stefangimmillaro 711 206 413ms 6 Oct 2025 First Prev 161–240 of 1,368 Next Last