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 635th ahmetdemirag 🇨🇾 674 83 9ms 8 Feb 2025 635th ndren 674 83 9ms 7 Jul 2025 635th andrewjc2000 674 83 9ms 31 Jul 2025 644th timvermeulen 674 89 109ms 19 Jan 2020 645th Jasper-Ty 🇵🇭 673 83 1ms 23 Apr 2022 645th jupj 🇫🇮 673 83 2ms 8 Oct 2022 647th snoozingnewt 🇨🇦 671 94 79ms 23 Oct 2025 648th steffan-polygolf 670 97 2ms 14 Feb 2024 648th FlyingPenguin223 670 97 1ms 10 Mar 2025 650th verticallity 670 120 142ms 7 Apr 2022 651st MeWhenI 🇻🇦 669 53 61ms 25 Jul 2022 651st dokutan 669 53 42ms 3 Nov 2024 653rd yzhs 🇩🇪 668 69 1,222ms 3 Aug 2021 654th Yewzir 🇧🇪 668 80 335ms 20 Feb 2024 654th namelessiw 668 80 554ms 6 May 2024 656th madeforlosers 668 102 39ms 7 May 2024 657th lifthrasiir 🇰🇷 667 48 2ms 29 Nov 2024 658th KatieLG 🇬🇧 666 84 10ms 19 Oct 2021 658th SomeKitten 🇺🇸 666 84 10ms 20 Aug 2022 658th mathisfun271 666 84 16ms 13 Feb 2024 658th qpwoeirut 666 84 9ms 18 Sep 2025 662nd stefangimmillaro 666 89 3,648ms 15 Nov 2024 663rd boxjelly 666 103 114ms 6 Jan 2021 663rd the-zammers 666 103 132ms 15 Dec 2023 663rd Awsute 666 103 119ms 20 Aug 2024 666th weliveinhell 🇭🇹 665 72 9ms 30 Sep 2023 666th unfinishedprogram 665 72 8ms 27 Oct 2023 666th stefangimmillaro 665 72 9ms 12 Sep 2024 669th Secozzi 665 84 2ms 14 Mar 2021 669th madex 🇩🇪 665 84 2ms 2 Aug 2021 671st kmathis22 665 106 451ms 10 days ago 672nd Shanethegamer 🇺🇸 663 95 80ms 13 Dec 2022 673rd DialFrost 🇸🇬 662 149 265ms 29 Nov 2023 673rd Yewzir 🇧🇪 662 149 285ms 3 Jan 2024 675th Yewzir 🇧🇪 662 153 2,381ms 8 May 2024 676th Yewzir 🇧🇪 659 84 2ms 28 Mar 2024 677th DialFrost 🇸🇬 657 96 90ms 27 May 2024 678th janbehrens 🇩🇪 656 69 332ms 9 Nov 2021 679th PsychoTea 656 98 333ms 21 Nov 2021 680th Attero 🇸🇪 655 68 207ms 6 Oct 2020 681st MeWhenI 🇻🇦 653 49 34ms 28 Nov 2021 681st emgordon154 653 49 2ms 18 Nov 2025 683rd GolfingSuccess 🇬🇷 652 82 439ms 15 Jan 2024 684th plcc0 650 86 10ms 27 Mar 2025 685th marshallward 🇺🇸 650 96 39ms 8 Jul 2021 686th SirFireball3521 646 69 252ms 2 Mar 2023 687th edsrzf 🇳🇿 645 100 4ms 10 Nov 2024 688th HumanoidCPU 644 75 38ms 2 Jun 2024 689th MeWhenI 🇻🇦 644 89 5ms 18 Nov 2023 690th MeWhenI 🇻🇦 644 102 1,227ms 19 Jun 2023 691st Shanethegamer 🇺🇸 644 153 285ms 26 Mar 2022 692nd geofft 643 87 9ms 12 Dec 2020 692nd programjames 643 87 10ms 7 May 2022 692nd jakobkordez 🇸🇮 643 87 11ms 28 Oct 2022 695th Shanethegamer 🇺🇸 642 87 1ms 4 Jan 2022 695th elgan65536 642 87 2ms 24 Oct 2023 697th Shanethegamer 🇺🇸 641 167 62ms 25 Jul 2021 698th Shanethegamer 🇺🇸 640 118 5ms 30 Aug 2024 699th alexsave 638 75 9ms 14 days ago 700th Shanethegamer 🇺🇸 638 126 147ms 13 Dec 2022 700th unfinishedprogram 638 126 149ms 23 Aug 2023 702nd Natanaelel 🇸🇪 637 70 228ms 8 Oct 2021 703rd dloscutoff 637 71 368ms 27 Nov 2018 704th stefangimmillaro 637 98 38ms 23 Aug 2024 705th KatieLG 🇬🇧 636 84 329ms 15 Jan 2024 706th MeWhenI 🇻🇦 635 69 679ms 15 Sep 2025 707th zdzc 635 88 9ms 8 Feb 2018 707th nstearns96 🇬🇧 635 88 10ms 8 Dec 2022 707th TaserTheFox 🇺🇸 635 88 13ms 1 May 2023 707th snoozingnewt 🇨🇦 635 88 10ms 20 Nov 2025 707th FortuiteMan 🇫🇷 635 88 9ms 11 days ago 712th emgordon154 634 121 6ms 10 Sep 2025 713th DialFrost 🇸🇬 634 201 448ms 8 Mar 2025 714th Shanethegamer 🇺🇸 633 121 42ms 28 Sep 2024 715th madeforlosers 630 76 9ms 31 Oct 2023 716th emgordon154 630 94 4,729ms 4 Jul 2025 717th Lydxn 🇨🇦 629 112 373ms 5 Jan 2024 717th Shanethegamer 🇺🇸 629 112 435ms 25 Sep 2025 719th Yewzir 🇧🇪 628 72 319ms 26 May 2024 720th giacomogallina 628 89 17ms 12 Jun 2019 First Prev 641–720 of 2,055 Next Last