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 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 878th Techdude01 554 101 9ms 21 Dec 2023 878th croc54 554 101 9ms 13 Dec 2024 883rd revlayle 🇺🇸 554 116 332ms 10 Dec 2022 884th Shanethegamer 🇺🇸 554 230 803ms 24 Apr 2025 885th MeWhenI 🇻🇦 552 113 40ms 11 Jun 2023 886th DialFrost 🇸🇬 551 89 4ms 28 Nov 2023 887th mcreenan 550 81 136ms 6 Apr 2018 888th dokutan 550 133 83ms 21 Jun 2025 889th MeWhenI 🇻🇦 550 146 132ms 22 Apr 2024 890th olligobber 🇦🇺 549 125 115ms 18 May 2020 891st Yewzir 🇧🇪 548 80 734ms 16 Nov 2025 892nd mosho-p 548 102 2,626ms 13 Oct 2022 892nd za3k 548 102 10ms 16 Oct 2022 892nd Jacob385 548 102 9ms 14 Mar 2024 892nd maxgodfrey2004 🇨🇦 548 102 9ms 14 Feb 2025 892nd RYSF13 🇨🇳 548 102 9ms 18 Jul 2025 897th dokutan 548 285 8ms 12 Jan 2024 898th bstrautin 547 88 269ms 10 Jun 2020 899th qwertyuiop3 🇷🇺 547 102 1ms 27 May 2025 900th varhammer 🇷🇺 547 138 5ms 3 Jan 2022 901st Mabeloid 🇳🇴 546 119 1ms 22 Sep 2024 902nd Mandrzejy 🇵🇱 546 134 520ms 25 Mar 2024 903rd emgordon154 546 206 2ms 23 May 2025 904th ridingqwerty 🇺🇸 545 98 471ms 22 Jan 2024 904th dokutan 545 98 429ms 15 May 2024 906th tobeannouncd 545 126 117ms 12 Jan 2024 907th KatieLG 🇬🇧 544 207 1ms 17 May 2025 908th grondilu 543 82 215ms 1 Sep 2023 909th DialFrost 🇸🇬 543 102 2ms 5 Nov 2023 909th HumanoidCPU 543 102 2ms 2 Jun 2024 909th albanian-laundromat 543 102 8ms 16 Nov 2025 912th RYNO8 543 103 10ms 11 Sep 2021 912th jeff-at-tamer-dot-codes 🇺🇸 543 103 11ms 13 Mar 2023 912th countlpaul-dotcom 543 103 10ms 19 Oct 2025 915th xyangst 538 89 8ms 18 Oct 2024 915th emgordon154 538 89 9ms 3 Jun 2025 917th Shanethegamer 🇺🇸 538 91 4ms 26 Oct 2022 918th abailey2020 🇺🇸 538 104 10ms 13 Dec 2020 918th karhuthebear 538 104 9ms 6 May 2022 918th Just4FunCoder 538 104 9ms 27 Nov 2022 918th SirFireball3521 538 104 10ms 2 Mar 2023 918th inverseLorentz 🇦🇺 538 104 10ms 23 Apr 2024 923rd janbehrens 🇩🇪 538 131 403ms 28 Nov 2023 924th janbehrens 🇩🇪 537 83 191ms 20 Jun 2021 925th c0d3-4-F00d 🇩🇪 537 104 2ms 11 Nov 2021 926th albanian-laundromat 535 82 722ms 16 Nov 2025 927th mhasch 534 80 2ms 10 Oct 2017 928th MeWhenI 🇻🇦 533 60 3ms 19 Jan 2022 929th Natanaelel 🇸🇪 533 121 4ms 10 Jul 2023 930th rambox11 532 90 9ms 17 Jun 2018 930th frobinsonj 532 90 9ms 28 Jun 2018 932nd zuparnowa 532 105 10ms 31 Jan 2019 932nd henrytranter 532 105 10ms 20 Sep 2019 932nd doug-h 532 105 10ms 26 May 2020 932nd 77Tigers 532 105 11ms 4 Feb 2021 932nd tpasfieldERAU 532 105 10ms 4 Nov 2022 937th KatieLG 🇬🇧 530 87 977ms 30 Apr 2021 938th dokutan 529 145 6ms 2 Jul 2024 939th bricknellj 529 218 2ms 30 Nov 2022 940th cywong-amino 🇭🇰 527 93 4ms 23 May 2020 941st sk- 527 106 11ms 11 Sep 2019 941st SniperSmiley 🇺🇸 527 106 10ms 12 Jun 2022 941st violeta-desantis 527 106 1ms 14 Feb 2024 944th coreynash 526 91 9ms 6 Nov 2022 944th targrik 526 91 9ms 24 Jul 2025 946th jacobly0 🇺🇸 525 193 1,761ms 22 Apr 2024 947th DaCuteRaccoon 524 85 171ms 27 Apr 2022 948th Jacob385 524 102 426ms 9 Apr 2024 949th HumanoidCPU 524 113 4,221ms 24 Oct 2024 950th Natanaelel 🇸🇪 522 104 2ms 28 Aug 2022 951st HumanoidCPU 522 107 2ms 3 Jun 2024 952nd Aurel300 🇨🇭 522 154 179ms 16 Jun 2024 953rd DaCuteRaccoon 521 82 3ms 27 Apr 2022 954th ETHproductions 🇺🇸 520 87 302ms 22 Dec 2018 955th neihousaigaai 520 92 8ms 7 May 2021 956th dokutan 519 217 1ms 15 Oct 2024 957th Indivicivet 518 86 244ms 24 Mar 2021 958th amollberg 🇸🇪 518 108 11ms 16 Jan 2022 959th mousetail 🇳🇱 518 155 133ms 16 Feb 2024 960th DialFrost 🇸🇬 517 108 1ms 4 Nov 2023 First Prev 881–960 of 2,056 Next Last