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 881st max-the-mage 540 98 10ms 29 Oct 2020 881st celiendonze 🇨🇭 540 98 13ms 26 Jun 2023 881st cingulataluke 540 98 9ms 26 Aug 2023 881st weliveinhell 🇭🇹 540 98 10ms 2 Oct 2024 881st 5quiwyrm 540 98 9ms 11 Feb 2025 886th Mandrzejy 🇵🇱 539 132 520ms 25 Mar 2024 887th qwertyuiop3 🇷🇺 538 100 1ms 27 May 2025 888th Mabeloid 🇳🇴 538 117 1ms 22 Sep 2024 889th janbehrens 🇩🇪 538 129 403ms 28 Nov 2023 890th bstrautin 537 86 269ms 10 Jun 2020 891st tobeannouncd 537 124 117ms 12 Jan 2024 892nd Yewzir 🇧🇪 536 78 734ms 16 Nov 2025 893rd ETHproductions 🇺🇸 536 79 302ms 22 Dec 2018 894th quimey 535 99 9ms 5 Jul 2023 894th Techdude01 535 99 9ms 21 Dec 2023 894th croc54 535 99 9ms 13 Dec 2024 897th DialFrost 🇸🇬 534 100 2ms 5 Nov 2023 897th HumanoidCPU 534 100 2ms 2 Jun 2024 899th Shanethegamer 🇺🇸 533 68 2ms 13 Dec 2022 899th DialFrost 🇸🇬 533 68 2ms 1 Feb 2025 901st varhammer 🇷🇺 533 138 5ms 3 Jan 2022 902nd albanian-laundromat 530 79 772ms 26 Sep 2025 903rd abailey2020 🇺🇸 530 100 10ms 13 Dec 2020 903rd mosho-p 530 100 2,626ms 13 Oct 2022 903rd za3k 530 100 10ms 16 Oct 2022 903rd maxgodfrey2004 🇨🇦 530 100 9ms 14 Feb 2025 907th Natanaelel 🇸🇪 528 67 228ms 8 Oct 2021 908th Shanethegamer 🇺🇸 528 89 4ms 26 Oct 2022 909th c0d3-4-F00d 🇩🇪 528 102 2ms 11 Nov 2021 910th bricknellj 528 218 2ms 30 Nov 2022 911th xyangst 527 87 8ms 18 Oct 2024 911th emgordon154 527 87 9ms 3 Jun 2025 913th Natanaelel 🇸🇪 525 119 4ms 10 Jul 2023 914th countlpaul-dotcom 524 101 10ms 19 Oct 2025 915th rambox11 521 88 9ms 17 Jun 2018 915th frobinsonj 521 88 9ms 28 Jun 2018 917th jacobly0 🇺🇸 520 191 1,761ms 22 Apr 2024 918th KatieLG 🇬🇧 519 85 977ms 30 Apr 2021 919th karhuthebear 519 102 9ms 6 May 2022 919th Just4FunCoder 519 102 9ms 27 Nov 2022 919th SirFireball3521 519 102 10ms 2 Mar 2023 919th inverseLorentz 🇦🇺 519 102 10ms 23 Apr 2024 923rd violeta-desantis 518 104 1ms 14 Feb 2024 924th MeWhenI 🇻🇦 517 58 3ms 19 Jan 2022 925th cywong-amino 🇭🇰 516 91 4ms 23 May 2020 926th HumanoidCPU 516 111 4,221ms 24 Oct 2024 927th coreynash 515 89 9ms 6 Nov 2022 927th targrik 515 89 9ms 24 Jul 2025 929th Aurel300 🇨🇭 515 152 179ms 16 Jun 2024 930th zuparnowa 514 103 10ms 31 Jan 2019 930th henrytranter 514 103 10ms 20 Sep 2019 930th doug-h 514 103 10ms 26 May 2020 930th 77Tigers 514 103 11ms 4 Feb 2021 930th tpasfieldERAU 514 103 10ms 4 Nov 2022 935th HumanoidCPU 514 484 10ms 2 Aug 2025 936th HumanoidCPU 513 105 2ms 3 Jun 2024 937th dokutan 513 485 9ms 7 Oct 2024 938th mousetail 🇳🇱 512 153 133ms 16 Feb 2024 939th neihousaigaai 510 90 8ms 7 May 2021 940th sk- 509 104 11ms 11 Sep 2019 940th SniperSmiley 🇺🇸 509 104 10ms 12 Jun 2022 942nd ridingqwerty 🇺🇸 508 96 471ms 22 Jan 2024 943rd DialFrost 🇸🇬 508 106 1ms 4 Nov 2023 944th KatieLG 🇬🇧 508 114 100ms 15 Jan 2023 945th SirBogman 🇺🇸 508 119 40ms 13 Jul 2020 946th RockOfStone 508 124 2ms 6 Mar 2024 947th inventshah 506 137 390ms 19 Nov 2022 948th Shanethegamer 🇺🇸 505 70 223ms 14 Dec 2022 949th inverseLorentz 🇦🇺 505 132 113ms 26 Apr 2024 950th gnlow 🇰🇷 504 91 9ms 27 Jan 2022 951st amollberg 🇸🇪 500 106 11ms 16 Jan 2022 951st JunkIce 500 106 10ms 19 Jan 2025 953rd pardouin 🇫🇷 500 498 10ms 24 Aug 2024 954th AkashTandon167 499 108 2ms 25 Nov 2019 954th CaedenHarper 🇨🇦 499 108 2ms 30 Jan 2025 956th delepoulle 499 139 390ms 12 Dec 2020 957th Lv0Sys 🇵🇱 498 92 8ms 20 days ago 958th Yewzir 🇧🇪 498 125 363ms 11 Feb 2024 959th Natanaelel 🇸🇪 496 102 2ms 28 Aug 2022 960th shraiwi 495 107 10ms 9 Dec 2020 First Prev 881–960 of 2,037 Next Last