The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Sierpiński Triangle 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 knutae 🇳🇴 576 92 10ms 4 Dec 2021 801st hellwue 576 92 9ms 29 Aug 2024 803rd frankgraziano 576 96 5ms 19 Feb 2025 804th Yewzir 🇧🇪 575 91 2ms 8 Apr 2024 804th emgordon154 575 91 120ms 24 Sep 2024 806th Yewzir 🇧🇪 575 120 395ms 29 Mar 2024 807th cbrt-x 574 116 115ms 11 Oct 2023 808th ETHproductions 🇺🇸 573 80 9ms 25 Jul 2018 808th madex 🇩🇪 573 80 9ms 3 Aug 2021 808th fitzdotlol 🇺🇸 573 80 9ms 21 Mar 2022 808th trinityy-7 573 80 9ms 8 Oct 2024 812th retrohun 573 94 1ms 9 Mar 2019 812th djeedjay 🇳🇱 573 94 1ms 29 Oct 2020 814th MeWhenI 🇻🇦 573 120 3ms 2 Oct 2022 815th arctouch-cristiannevianna 571 109 326ms 24 Nov 2023 816th RussellEmerine 570 117 117ms 9 Apr 2020 816th guliyevemil1 🇦🇿 570 117 124ms 20 Apr 2020 818th skps2010 569 93 10ms 15 Jun 2019 818th tooningelaere 569 93 10ms 4 Dec 2022 818th andre-lameirinhas 🇵🇹 569 93 9ms 23 May 2023 818th vhoulbreque 🇫🇷 569 93 10ms 18 days ago 822nd user189032 566 81 8ms 29 May 2019 823rd rak1507 🇬🇧 565 118 121ms 29 Jun 2021 824th HumanoidCPU 565 124 209ms 12 Nov 2025 825th dokutan 564 196 1ms 15 Oct 2024 826th DialFrost 🇸🇬 563 82 227ms 14 Jun 2024 827th Shanethegamer 🇺🇸 563 93 2ms 31 Oct 2022 827th alphafalfa 563 93 2ms 1 Aug 2025 829th ieeemma 563 94 10ms 1 Feb 2020 829th OllieBoyne 🇬🇧 563 94 11ms 29 Jan 2021 829th Mikey-Beep 🇬🇧 563 94 10ms 2 Jun 2024 829th solisolu 563 94 10ms 15 Nov 2025 833rd Shanethegamer 🇺🇸 563 103 98ms 26 Mar 2022 834th jmerle 🇳🇱 561 275 7ms 4 Jul 2023 835th anastos 560 119 116ms 23 Jul 2018 836th Yewzir 🇧🇪 557 86 2ms 15 Oct 2023 837th martinnorling 🇸🇪 557 95 10ms 31 Mar 2022 837th rollershutter 557 95 12ms 30 Jun 2024 837th hiichbindermax 557 95 9ms 17 Sep 2024 837th ToE42 557 95 10ms 28 May 2025 841st dokutan 557 126 718ms 7 days ago 842nd DaCuteRaccoon 556 80 34ms 27 Apr 2022 842nd aksyristos 556 80 36ms 31 Jan 2023 844th mossprescott 555 120 108ms 13 Aug 2018 844th janbehrens 🇩🇪 555 120 114ms 17 Jun 2021 846th emgordon154 555 179 1,666ms 3 Jun 2025 847th TheZwierzLF 🇵🇱 554 88 392ms 24 days ago 848th janlelis 553 83 9ms 9 Feb 2021 848th Shanethegamer 🇺🇸 553 83 9ms 16 Jul 2021 850th Indivicivet 552 96 10ms 17 Mar 2021 850th Bonjour27891 🇻🇳 552 96 12ms 6 Mar 2022 850th nullie 552 96 9ms 15 Jun 2022 850th johndixon01 552 96 10ms 22 Sep 2022 850th ridingqwerty 🇺🇸 552 96 10ms 19 Dec 2023 850th theadamabrams 552 96 9ms 28 Nov 2024 850th TheZwierzLF 🇵🇱 552 96 9ms 24 days ago 857th Yewzir 🇧🇪 551 120 36ms 29 Mar 2024 858th Shanethegamer 🇺🇸 550 228 803ms 24 Apr 2025 859th olleicua 🇺🇸 549 81 37ms 15 Feb 2024 860th dokutan 549 281 8ms 12 Jan 2024 861st janbehrens 🇩🇪 548 128 120ms 17 Jun 2021 862nd Yewzir 🇧🇪 547 106 78ms 29 Mar 2024 863rd DialFrost 🇸🇬 547 126 553ms 8 Jun 2024 864th wadefletch 546 97 9ms 8 Feb 2020 864th Psirving 546 97 9ms 1 Aug 2020 864th AkashTandon167 546 97 11ms 3 Jan 2021 864th kirbyyourmom 🇬🇧 546 97 10ms 4 Mar 2021 864th vezzick 546 97 10ms 12 Mar 2021 864th jtaxen 546 97 9ms 5 Apr 2024 870th revlayle 🇺🇸 546 114 332ms 10 Dec 2022 871st albanian-laundromat 545 98 8ms 16 Nov 2025 872nd KatieLG 🇬🇧 545 203 1ms 17 May 2025 873rd MeWhenI 🇻🇦 544 111 40ms 11 Jun 2023 874th MeWhenI 🇻🇦 544 144 132ms 22 Apr 2024 875th dokutan 543 114 66ms 5 days ago 876th dokutan 543 131 83ms 21 Jun 2025 877th olligobber 🇦🇺 542 123 115ms 18 May 2020 878th emgordon154 542 204 2ms 23 May 2025 879th DialFrost 🇸🇬 540 87 4ms 28 Nov 2023 880th max-the-mage 540 98 10ms 29 Oct 2020 First Prev 801–880 of 2,036 Next Last