The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Rule 110 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 561st inventshah 598 82 8ms 11 Sep 2022 562nd yzhs 🇩🇪 597 97 19ms 25 Oct 2020 562nd wh3n3v3r 🇨🇿 597 97 17ms 20 Nov 2024 562nd JunkIce 597 97 17ms 24 Jan 2025 562nd ryyyn 🇺🇸 597 97 16ms 5 Nov 2025 566th KatieLG 🇬🇧 597 264 50ms 11 Oct 2025 567th MateuszPietrzak 🇵🇱 595 160 508ms 11 Jan 2024 568th Shanethegamer 🇺🇸 595 162 128ms 27 Feb 2023 568th klixel 🇨🇦 595 162 125ms 10 May 2023 570th primo-ppcg 🇹🇭 594 179 410ms 14 Jul 2020 571st retrohun 593 121 5ms 12 Nov 2022 572nd MeWhenI 🇻🇦 593 179 4ms 24 Jul 2023 573rd qpwoeirut 591 98 11ms 11 Aug 2025 574th omurakazuaki 🇯🇵 591 119 10ms 15 Mar 2021 574th alexsave 591 119 10ms 4 Nov 2025 576th tatzyr 🇯🇵 589 92 67ms 10 Dec 2024 577th Shanethegamer 🇺🇸 589 97 934ms 27 Feb 2023 578th janAkali 🇷🇺 589 175 668ms 16 Nov 2025 579th tsunderu 🇯🇵 588 131 6ms 25 Aug 2021 579th Mandrzejy 🇵🇱 588 131 6ms 27 Feb 2024 581st Shanethegamer 🇺🇸 587 63 6ms 6 Feb 2022 582nd o0lit3 🇺🇸 586 72 11ms 3 Oct 2020 583rd roguh 🇬🇹 585 99 11ms 22 Feb 2024 584th MeWhenI 🇻🇦 585 208 106ms 7 Jun 2023 585th anter69 🇭🇺 583 98 935ms 24 Feb 2023 586th proton 🇩🇪 582 93 39ms 10 Jun 2020 586th razetime 582 93 41ms 25 Jan 2021 586th olivermrose 🇺🇸 582 93 43ms 24 Oct 2021 586th scpchicken 🇵🇼 582 93 41ms 22 Apr 2023 590th UnderKoen 🇳🇱 582 271 35ms 20 Jan 2025 591st thisishowmymindworks 🇳🇴 581 121 10ms 15 Aug 2020 591st XenThe 🇬🇧 581 121 9ms 1 Jul 2025 593rd Indivicivet 579 133 6ms 16 Mar 2021 594th Shanethegamer 🇺🇸 579 223 25ms 25 Mar 2022 595th Shanethegamer 🇺🇸 578 136 134ms 20 May 2022 596th janbehrens 🇩🇪 578 184 433ms 15 Nov 2022 597th MeWhenI 🇻🇦 577 156 46ms 2 Jun 2024 598th jbt 576 122 11ms 26 Dec 2023 599th TimCurwick 🇺🇸 575 109 316ms 30 Jul 2020 600th JunkIce 574 97 383ms 24 Jan 2025 601st SirBogman 🇺🇸 574 137 181ms 27 Nov 2021 602nd RockOfStone 574 180 5ms 10 Mar 2024 603rd abailey2020 🇺🇸 573 101 11ms 12 Dec 2020 603rd marcin7Cd 573 101 18ms 16 Dec 2020 603rd fgrosshans 🇫🇷 573 101 19ms 22 Jul 2024 606th alexkunin 572 123 10ms 3 Jul 2019 607th MeWhenI 🇻🇦 570 126 13ms 3 Jul 2023 608th cmayer777 570 167 81ms 21 Oct 2022 609th ian-h-chamberlain 🇺🇸 570 169 143ms 8 Oct 2020 610th edsrzf 🇳🇿 570 176 1,308ms 29 Apr 2025 611th Alex-x90 🇺🇸 570 222 284ms 19 Sep 2024 612th leon-w 568 102 12ms 4 Jan 2019 613th BBoehm 🇩🇪 567 124 11ms 10 Nov 2020 614th iczelia 🇩🇪 566 139 141ms 19 Oct 2025 615th bac0id 564 140 370ms 4 Jul 2024 616th funnsam 🇭🇰 564 171 136ms 12 Aug 2024 617th galloj 🇨🇿 562 103 11ms 24 Jan 2021 617th luuumine 🇫🇷 562 103 15ms 17 Oct 2025 619th guliyevemil1 🇦🇿 562 225 281ms 16 Apr 2020 620th janbehrens 🇩🇪 561 158 434ms 15 Nov 2022 621st msbranicky 561 165 9ms 3 Oct 2024 622nd MeWhenI 🇻🇦 560 141 355ms 19 Jun 2025 623rd msbranicky 558 227 295ms 30 Aug 2023 624th keelimeguy 🇺🇸 557 104 18ms 7 Nov 2023 625th janbehrens 🇩🇪 556 142 355ms 10 Jul 2023 626th MeWhenI 🇻🇦 554 113 134ms 3 Aug 2024 627th bac0id 554 192 412ms 28 Jun 2024 628th aaronze 🇦🇺 553 98 34ms 20 Sep 2023 629th Shanethegamer 🇺🇸 552 143 350ms 9 Apr 2025 630th jacobly0 🇺🇸 551 249 1,798ms 22 Apr 2024 631st roguh 🇬🇹 550 221 26ms 22 Feb 2024 632nd MeWhenI 🇻🇦 548 169 99ms 15 Oct 2022 633rd emgordon154 548 180 5ms 12 Jan 2025 634th Jacob385 548 194 381ms 10 Nov 2025 635th cmayer777 547 141 6ms 21 Oct 2022 636th dokutan 547 174 3,107ms 4 Apr 2025 637th EnTerr 546 106 15ms 1 Sep 2024 638th juliansiebert 🇩🇪 545 115 328ms 19 Dec 2023 639th ToriTheChicken 545 129 10ms 31 Jul 2020 639th olleicua 🇺🇸 545 129 11ms 9 Sep 2025 First Prev 561–640 of 1,615 Next Last