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 879th quimey 554 101 9ms 5 Jul 2023 879th Techdude01 554 101 9ms 21 Dec 2023 879th croc54 554 101 9ms 13 Dec 2024 884th revlayle 🇺🇸 554 116 332ms 10 Dec 2022 885th Shanethegamer 🇺🇸 554 230 803ms 24 Apr 2025 886th MeWhenI 🇻🇦 552 113 40ms 11 Jun 2023 887th DialFrost 🇸🇬 551 89 4ms 28 Nov 2023 888th mcreenan 550 81 136ms 6 Apr 2018 889th dokutan 550 133 83ms 21 Jun 2025 890th MeWhenI 🇻🇦 550 146 132ms 22 Apr 2024 891st olligobber 🇦🇺 549 125 115ms 18 May 2020 892nd Yewzir 🇧🇪 548 80 734ms 16 Nov 2025 893rd mosho-p 548 102 2,626ms 13 Oct 2022 893rd za3k 548 102 10ms 16 Oct 2022 893rd Jacob385 548 102 9ms 14 Mar 2024 893rd maxgodfrey2004 🇨🇦 548 102 9ms 14 Feb 2025 893rd RYSF13 🇨🇳 548 102 9ms 18 Jul 2025 898th dokutan 548 285 8ms 12 Jan 2024 899th bstrautin 547 88 269ms 10 Jun 2020 900th qwertyuiop3 🇷🇺 547 102 1ms 27 May 2025 901st varhammer 🇷🇺 547 138 5ms 3 Jan 2022 902nd Mabeloid 🇳🇴 546 119 1ms 22 Sep 2024 903rd Mandrzejy 🇵🇱 546 134 520ms 25 Mar 2024 904th emgordon154 546 206 2ms 23 May 2025 905th ridingqwerty 🇺🇸 545 98 471ms 22 Jan 2024 905th dokutan 545 98 429ms 15 May 2024 907th tobeannouncd 545 126 117ms 12 Jan 2024 908th KatieLG 🇬🇧 544 207 1ms 17 May 2025 909th grondilu 543 82 215ms 1 Sep 2023 910th DialFrost 🇸🇬 543 102 2ms 5 Nov 2023 910th HumanoidCPU 543 102 2ms 2 Jun 2024 910th albanian-laundromat 543 102 8ms 16 Nov 2025 913th RYNO8 543 103 10ms 11 Sep 2021 913th jeff-at-tamer-dot-codes 🇺🇸 543 103 11ms 13 Mar 2023 913th countlpaul-dotcom 543 103 10ms 19 Oct 2025 916th xyangst 538 89 8ms 18 Oct 2024 916th emgordon154 538 89 9ms 3 Jun 2025 918th Shanethegamer 🇺🇸 538 91 4ms 26 Oct 2022 919th abailey2020 🇺🇸 538 104 10ms 13 Dec 2020 919th karhuthebear 538 104 9ms 6 May 2022 919th Just4FunCoder 538 104 9ms 27 Nov 2022 919th SirFireball3521 538 104 10ms 2 Mar 2023 919th inverseLorentz 🇦🇺 538 104 10ms 23 Apr 2024 924th janbehrens 🇩🇪 538 131 403ms 28 Nov 2023 925th janbehrens 🇩🇪 537 83 191ms 20 Jun 2021 926th c0d3-4-F00d 🇩🇪 537 104 2ms 11 Nov 2021 927th albanian-laundromat 535 82 722ms 16 Nov 2025 928th mhasch 534 80 2ms 10 Oct 2017 929th MeWhenI 🇻🇦 533 60 3ms 19 Jan 2022 930th zuparnowa 533 105 10ms 31 Jan 2019 930th henrytranter 533 105 10ms 20 Sep 2019 930th doug-h 533 105 10ms 26 May 2020 930th 77Tigers 533 105 11ms 4 Feb 2021 930th tpasfieldERAU 533 105 10ms 4 Nov 2022 935th Natanaelel 🇸🇪 533 121 4ms 10 Jul 2023 936th rambox11 532 90 9ms 17 Jun 2018 936th frobinsonj 532 90 9ms 28 Jun 2018 938th KatieLG 🇬🇧 530 87 977ms 30 Apr 2021 939th dokutan 529 145 6ms 2 Jul 2024 940th bricknellj 529 218 2ms 30 Nov 2022 941st cywong-amino 🇭🇰 527 93 4ms 23 May 2020 942nd sk- 527 106 11ms 11 Sep 2019 942nd SniperSmiley 🇺🇸 527 106 10ms 12 Jun 2022 942nd violeta-desantis 527 106 1ms 14 Feb 2024 945th coreynash 526 91 9ms 6 Nov 2022 945th targrik 526 91 9ms 24 Jul 2025 947th jacobly0 🇺🇸 525 193 1,761ms 22 Apr 2024 948th DaCuteRaccoon 524 85 171ms 27 Apr 2022 949th Jacob385 524 102 426ms 9 Apr 2024 950th HumanoidCPU 524 113 4,221ms 24 Oct 2024 951st Natanaelel 🇸🇪 522 104 2ms 28 Aug 2022 952nd HumanoidCPU 522 107 2ms 3 Jun 2024 953rd Aurel300 🇨🇭 522 154 179ms 16 Jun 2024 954th DaCuteRaccoon 521 82 3ms 27 Apr 2022 955th ETHproductions 🇺🇸 520 87 302ms 22 Dec 2018 956th neihousaigaai 520 92 8ms 7 May 2021 957th dokutan 519 217 1ms 15 Oct 2024 958th Indivicivet 518 86 244ms 24 Mar 2021 959th amollberg 🇸🇪 518 108 11ms 16 Jan 2022 960th mousetail 🇳🇱 518 155 133ms 16 Feb 2024 First Prev 881–960 of 2,057 Next Last