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 561st thisishowmymindworks 🇳🇴 708 79 10ms 5 Oct 2020 561st SnowballSH 708 79 12ms 4 Mar 2021 561st NewDefectus 🇮🇱 708 79 9ms 9 Nov 2021 561st fourth-bit 708 79 10ms 23 Sep 2024 561st Pyroan 708 79 9ms 22 Feb 2025 561st wuduculfre 708 79 9ms 22 Jul 2025 561st cros107 🇦🇺 708 79 9ms 12 days ago 568th flawr 708 97 115ms 24 Feb 2019 569th bluebear94 707 63 129ms 12 Feb 2018 570th buddy1616 707 79 1ms 26 Apr 2019 570th ktiy 707 79 2ms 2 Jun 2021 570th m-tkach 🇺🇦 707 79 2ms 15 Dec 2022 573rd stefangimmillaro 705 100 428ms 6 Oct 2025 574th cywong-amino 🇭🇰 704 68 9ms 30 May 2020 574th dmrichwa 🇺🇸 704 68 9ms 22 Jan 2023 574th kcinnu 🇱🇹 704 68 9ms 15 Nov 2023 577th Shanethegamer 🇺🇸 704 109 10ms 19 Dec 2023 578th SirBogman 🇺🇸 703 76 444ms 16 Jan 2024 579th SirBogman 🇺🇸 701 358 11ms 23 Nov 2022 580th D-MOVE 🇵🇭 700 69 48ms 9 days ago 581st MeWhenI 🇻🇦 700 70 4ms 3 Jul 2023 582nd Ripick 700 103 271ms 21 May 2023 583rd yzhs 🇩🇪 699 80 10ms 6 Sep 2020 583rd namelessiw 699 80 9ms 6 May 2024 585th s-g-stavely 699 93 2ms 12 May 2021 586th Shanethegamer 🇺🇸 699 94 1,278ms 9 Mar 2023 587th Feniske 🇫🇷 698 69 250ms 10 Nov 2023 588th foxmcloud555 698 80 2ms 28 Apr 2022 588th aksyristos 698 80 2ms 10 Feb 2023 588th neel11235813 698 80 1ms 14 Mar 2023 588th klixel 🇨🇦 698 80 2ms 7 Jun 2023 588th Herbert00709 🇵🇱 698 80 2ms 23 Nov 2024 588th TeodorDyakov 🇧🇬 698 80 1ms 23 Sep 2025 594th MeWhenI 🇻🇦 697 85 3,677ms 27 Oct 2024 594th pardouin 🇫🇷 697 85 3,879ms 12 Nov 2024 594th aditsu 697 85 3,699ms 13 Aug 2025 597th cure-honey 🇯🇵 697 86 79ms 10 Jul 2021 598th DialFrost 🇸🇬 696 65 2,299ms 31 Dec 2023 599th inventshah 696 78 199ms 6 Jul 2022 600th steffan-polygolf 695 51 54ms 21 Feb 2024 601st janbehrens 🇩🇪 695 154 25ms 8 Jul 2021 602nd commandblockguy 🇺🇸 694 77 631ms 15 Jan 2024 603rd MeWhenI 🇻🇦 692 103 72ms 2 Nov 2023 604th argusdusty 🇺🇸 690 81 10ms 31 Dec 2020 604th scpchicken 🇵🇼 690 81 10ms 13 Mar 2022 604th mathb0y512 690 81 11ms 24 Nov 2022 604th Bulmenisaurus 690 81 10ms 5 Jan 2025 604th InigoK 🇺🇸 690 81 10ms 22 Sep 2025 609th janbehrens 🇩🇪 689 62 3ms 28 Nov 2023 610th Shanethegamer 🇺🇸 688 99 35ms 14 Jun 2022 611th typeswitch-dev 🇵🇹 688 103 3ms 28 Jul 2023 612th bforte 686 100 113ms 21 Dec 2018 613th cure-honey 🇯🇵 685 66 291ms 15 Jul 2021 613th MeWhenI 🇻🇦 685 66 293ms 15 Feb 2023 615th steffan-polygolf 685 78 388ms 7 Mar 2024 616th XenThe 🇬🇧 684 70 9ms 14 Jun 2025 617th Shanethegamer 🇺🇸 684 95 2ms 23 Jul 2021 618th Shanethegamer 🇺🇸 683 107 451ms 4 Jan 2022 619th redbeancola 682 82 11ms 11 Oct 2021 619th aksyristos 682 82 10ms 28 Feb 2023 621st jared-hughes 681 47 35ms 25 Sep 2021 622nd 09cf 681 82 2ms 17 days ago 623rd elgan65536 681 118 134ms 23 Oct 2023 624th TheZwierzLF 🇵🇱 680 71 44ms 40 hours ago 625th annaproxy 680 90 63ms 11 Dec 2022 626th yzhs 🇩🇪 680 101 113ms 18 Jan 2020 627th MeWhenI 🇻🇦 679 80 2ms 12 Nov 2022 628th Shanethegamer 🇺🇸 679 95 4ms 19 Oct 2024 629th Natanaelel 🇸🇪 678 63 2ms 29 Aug 2022 630th Shanethegamer 🇺🇸 678 68 1,108ms 2 Jul 2021 631st SmartK8 🇨🇿 677 95 351ms 29 Oct 2022 632nd SirBogman 🇺🇸 675 66 226ms 5 Oct 2020 633rd Shanethegamer 🇺🇸 675 67 456ms 2 Jul 2021 634th didion0 🇺🇸 674 71 9ms 9 Feb 2021 635th kevinmchung 674 83 10ms 1 Mar 2018 635th myfatemi04 674 83 10ms 1 Mar 2018 635th dzhang314 674 83 17ms 14 Aug 2019 635th GolfingSuccess 🇬🇷 674 83 15ms 6 May 2022 635th glesnick 674 83 11ms 15 Jul 2022 635th elephantpanda 674 83 9ms 31 Aug 2022 First Prev 561–640 of 2,055 Next Last