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 chars. 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 Chars Time Submitted 801st dokutan 184 664 1,299ms 24 Mar 2025 802nd Shanethegamer 🇺🇸 184 777 41ms 22 Aug 2024 802nd KatieLG 🇬🇧 184 777 40ms 22 Aug 2024 802nd HumanoidCPU 184 777 39ms 25 Aug 2024 802nd Mabeloid 🇳🇴 184 777 41ms 21 Sep 2024 802nd error256 184 777 42ms 10 Jan 2025 802nd CaedenHarper 🇨🇦 184 777 39ms 22 Jan 2025 802nd gigaprofisi 🇺🇸 184 777 40ms 5 Nov 2025 809th MichalMarsalek 🇨🇿 184 1,177 5ms 1 Sep 2023 810th retrohun 183 570 55ms 6 Sep 2023 811th alexsave 183 577 9ms 4 Nov 2025 812th KatieLG 🇬🇧 183 791 1ms 8 Oct 2023 812th snoozingnewt 🇨🇦 183 791 2ms 12 Nov 2025 812th CaedenHarper 🇨🇦 183 791 1ms 12 Nov 2025 812th Shanethegamer 🇺🇸 183 791 1ms 12 Nov 2025 812th HumanoidCPU 183 791 1ms 12 Nov 2025 812th gigaprofisi 🇺🇸 183 791 1ms 13 Nov 2025 818th Schmitt-Very-Cool 183 808 457ms 3 Oct 2025 818th gigaprofisi 🇺🇸 183 808 418ms 5 Nov 2025 820th TheZwierzLF 🇵🇱 182 346 2ms 25 days ago 821st dokutan 182 457 222ms 14 Apr 2025 822nd KatieLG-Transpiler 🇬🇧 182 795 2ms 8 Oct 2023 823rd KatieLG 🇬🇧 181 815 522ms 24 Sep 2025 824th MeWhenI 🇻🇦 180 815 276ms 1 Sep 2023 824th Shanethegamer 🇺🇸 180 815 352ms 13 Sep 2023 824th KatieLG 🇬🇧 180 815 262ms 23 Mar 2024 824th HumanoidCPU 180 815 266ms 26 Aug 2024 828th msbranicky 179 571 185ms 15 Jan 2024 829th gifti258 179 585 189ms 13 Sep 2023 830th iczelia 🇩🇪 179 591 8ms 8 Nov 2025 831st dokutan 179 666 271ms 21 Jun 2025 832nd KatieLG-Transpiler 🇬🇧 178 822 270ms 2 Sep 2023 833rd olleicua 🇺🇸 177 460 38ms 11 Apr 2024 834th ndren 176 598 3ms 2 Sep 2023 835th msbranicky 176 601 8ms 8 Sep 2023 836th kkoenig 176 834 257ms 3 Jan 2024 837th Mabeloid 🇳🇴 176 835 260ms 21 Sep 2024 838th MarcMush 🇫🇷 175 360 2ms 7 Jan 2024 839th Shanethegamer 🇺🇸 175 786 349ms 1 Sep 2023 839th MeWhenI 🇻🇦 175 786 308ms 1 Sep 2023 839th Maximizer02 175 786 312ms 12 Mar 2024 839th KatieLG 🇬🇧 175 786 321ms 5 May 2024 839th Jacob385 175 786 317ms 18 Mar 2025 839th fuzzylojik-golf 🇺🇸 175 786 374ms 7 Sep 2025 839th Babafaba 175 786 379ms 30 Oct 2025 839th HumanoidCPU 175 786 359ms 9 Nov 2025 847th rollershutter 175 847 346ms 29 Jan 2025 848th neihousaigaai 174 502 9ms 12 Feb 2024 849th Shanethegamer 🇺🇸 174 771 4ms 8 May 2025 849th fuzzylojik-golf 🇺🇸 174 771 4ms 8 Jul 2025 851st Adix-null 🇱🇹 174 790 355ms 10 Dec 2024 851st rollershutter 174 790 327ms 29 Jan 2025 851st heanyang1 174 790 355ms 23 May 2025 851st KasperKivimaeki 🇫🇮 174 790 337ms 2 Jul 2025 851st Blockyheadman 174 790 366ms 6 Nov 2025 856th MeWhenI 🇻🇦 173 773 4ms 1 Sep 2023 856th josh-h-90 173 773 4ms 8 Sep 2023 856th msbranicky 173 773 5ms 17 Sep 2023 856th snoozingnewt 🇨🇦 173 773 4ms 17 Sep 2023 856th satutalo 🇫🇮 173 773 4ms 25 Sep 2023 856th HumanoidCPU 173 773 4ms 16 Apr 2024 856th Mabeloid 🇳🇴 173 773 6ms 21 Sep 2024 856th CaedenHarper 🇨🇦 173 773 4ms 22 Jan 2025 864th Zach1031 173 795 371ms 27 days ago 865th Mabeloid 🇳🇴 173 855 358ms 21 Sep 2024 866th dokutan 172 606 735ms 15 Jul 2025 867th KatieLG 🇬🇧 172 776 5ms 11 Dec 2023 867th Shanethegamer 🇺🇸 172 776 6ms 11 Dec 2023 867th theunofficialcoder 172 776 5ms 12 Jan 2024 867th HumanoidCPU 172 776 5ms 16 Apr 2024 867th KatieLG-Transpiler 🇬🇧 172 776 5ms 16 Aug 2024 867th Mabeloid 🇳🇴 172 776 4ms 21 Sep 2024 867th CaedenHarper 🇨🇦 172 776 8ms 20 Jan 2025 867th Babafaba 172 776 7ms 29 Oct 2025 875th Mabeloid 🇳🇴 172 800 375ms 21 Sep 2024 875th GolfingSuccess 🇬🇷 172 800 355ms 17 Oct 2024 875th aksyristos 172 800 333ms 18 Oct 2024 875th QeepQeep 172 800 369ms 10 Nov 2024 875th Quirkly-Quasar 172 800 366ms 23 Nov 2024 875th neel11235813 172 800 338ms 9 Dec 2024 First Prev 801–880 of 1,341 Next Last