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 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 797th error256 184 777 42ms 10 Jan 2025 797th CaedenHarper 🇨🇦 184 777 39ms 22 Jan 2025 797th gigaprofisi 🇺🇸 184 777 40ms 5 Nov 2025 804th MichalMarsalek 🇨🇿 184 1,177 5ms 1 Sep 2023 805th retrohun 183 570 55ms 6 Sep 2023 806th alexsave 183 577 9ms 4 Nov 2025 807th KatieLG 🇬🇧 183 791 1ms 8 Oct 2023 807th snoozingnewt 🇨🇦 183 791 2ms 12 Nov 2025 807th CaedenHarper 🇨🇦 183 791 1ms 12 Nov 2025 807th Shanethegamer 🇺🇸 183 791 1ms 12 Nov 2025 807th HumanoidCPU 183 791 1ms 12 Nov 2025 807th gigaprofisi 🇺🇸 183 791 1ms 13 Nov 2025 813th Schmitt-Very-Cool 183 808 457ms 3 Oct 2025 813th gigaprofisi 🇺🇸 183 808 418ms 5 Nov 2025 815th TheZwierzLF 🇵🇱 182 346 2ms 25 Nov 2025 816th dokutan 182 457 222ms 14 Apr 2025 817th KatieLG-Transpiler 🇬🇧 182 795 2ms 8 Oct 2023 818th KatieLG 🇬🇧 181 815 522ms 24 Sep 2025 819th MeWhenI 🇻🇦 180 815 276ms 1 Sep 2023 819th Shanethegamer 🇺🇸 180 815 352ms 13 Sep 2023 819th KatieLG 🇬🇧 180 815 262ms 23 Mar 2024 819th HumanoidCPU 180 815 266ms 26 Aug 2024 823rd msbranicky 179 571 185ms 15 Jan 2024 824th gifti258 179 585 189ms 13 Sep 2023 825th iczelia 🇩🇪 179 591 8ms 8 Nov 2025 826th dokutan 179 666 271ms 21 Jun 2025 827th KatieLG-Transpiler 🇬🇧 178 822 270ms 2 Sep 2023 828th olleicua 🇺🇸 177 460 38ms 11 Apr 2024 829th ndren 176 598 3ms 2 Sep 2023 830th msbranicky 176 601 8ms 8 Sep 2023 831st kkoenig 176 834 257ms 3 Jan 2024 832nd Mabeloid 🇳🇴 176 835 260ms 21 Sep 2024 833rd MarcMush 🇫🇷 175 360 2ms 7 Jan 2024 834th Shanethegamer 🇺🇸 175 786 349ms 1 Sep 2023 834th MeWhenI 🇻🇦 175 786 308ms 1 Sep 2023 834th Maximizer02 175 786 312ms 12 Mar 2024 834th KatieLG 🇬🇧 175 786 321ms 5 May 2024 834th Jacob385 175 786 317ms 18 Mar 2025 834th fuzzylojik-golf 🇺🇸 175 786 374ms 7 Sep 2025 834th Babafaba 175 786 379ms 30 Oct 2025 834th HumanoidCPU 175 786 359ms 9 Nov 2025 842nd rollershutter 175 847 346ms 29 Jan 2025 843rd neihousaigaai 174 502 9ms 12 Feb 2024 844th Shanethegamer 🇺🇸 174 771 5ms 8 May 2025 844th fuzzylojik-golf 🇺🇸 174 771 5ms 8 Jul 2025 846th Adix-null 🇱🇹 174 790 355ms 10 Dec 2024 846th rollershutter 174 790 327ms 29 Jan 2025 846th heanyang1 174 790 355ms 23 May 2025 846th KasperKivimaeki 🇫🇮 174 790 337ms 2 Jul 2025 846th Blockyheadman 174 790 366ms 6 Nov 2025 851st MeWhenI 🇻🇦 173 773 6ms 1 Sep 2023 851st josh-h-90 173 773 7ms 8 Sep 2023 851st msbranicky 173 773 6ms 17 Sep 2023 851st snoozingnewt 🇨🇦 173 773 6ms 17 Sep 2023 851st satutalo 🇫🇮 173 773 7ms 25 Sep 2023 851st HumanoidCPU 173 773 7ms 16 Apr 2024 851st Mabeloid 🇳🇴 173 773 6ms 21 Sep 2024 851st CaedenHarper 🇨🇦 173 773 5ms 22 Jan 2025 859th Zach1031 173 795 371ms 23 Nov 2025 860th Mabeloid 🇳🇴 173 855 358ms 21 Sep 2024 861st dokutan 172 606 735ms 15 Jul 2025 862nd KatieLG 🇬🇧 172 776 5ms 11 Dec 2023 862nd Shanethegamer 🇺🇸 172 776 6ms 11 Dec 2023 862nd theunofficialcoder 172 776 5ms 12 Jan 2024 862nd HumanoidCPU 172 776 5ms 16 Apr 2024 862nd KatieLG-Transpiler 🇬🇧 172 776 5ms 16 Aug 2024 862nd Mabeloid 🇳🇴 172 776 4ms 21 Sep 2024 862nd CaedenHarper 🇨🇦 172 776 8ms 20 Jan 2025 862nd Babafaba 172 776 7ms 29 Oct 2025 870th Mabeloid 🇳🇴 172 800 375ms 21 Sep 2024 870th GolfingSuccess 🇬🇷 172 800 355ms 17 Oct 2024 870th aksyristos 172 800 333ms 18 Oct 2024 870th QeepQeep 172 800 369ms 10 Nov 2024 870th Quirkly-Quasar 172 800 366ms 23 Nov 2024 870th neel11235813 172 800 338ms 9 Dec 2024 870th Schmitt-Very-Cool 172 800 350ms 28 May 2025 870th JOrE-Softwares 172 800 364ms 1 Jun 2025 870th BREMAUCY 🇫🇷 172 800 350ms 7 Aug 2025 870th JOrE20 🇺🇸 172 800 354ms 6 Nov 2025 870th gigaprofisi 🇺🇸 172 800 317ms 13 Nov 2025 First Prev 801–880 of 1,346 Next Last