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 636th elephantpanda 674 83 9ms 31 Aug 2022 636th ahmetdemirag 🇨🇾 674 83 9ms 8 Feb 2025 636th ndren 674 83 9ms 7 Jul 2025 636th andrewjc2000 674 83 9ms 31 Jul 2025 645th timvermeulen 674 89 109ms 19 Jan 2020 646th Jasper-Ty 🇵🇭 673 83 1ms 23 Apr 2022 646th jupj 🇫🇮 673 83 2ms 8 Oct 2022 648th snoozingnewt 🇨🇦 671 94 79ms 23 Oct 2025 649th steffan-polygolf 670 97 2ms 14 Feb 2024 649th FlyingPenguin223 670 97 1ms 10 Mar 2025 651st verticallity 670 120 142ms 7 Apr 2022 652nd MeWhenI 🇻🇦 669 53 61ms 25 Jul 2022 652nd dokutan 669 53 42ms 3 Nov 2024 654th yzhs 🇩🇪 668 69 1,222ms 3 Aug 2021 655th Yewzir 🇧🇪 668 80 335ms 20 Feb 2024 655th namelessiw 668 80 554ms 6 May 2024 657th madeforlosers 668 102 39ms 7 May 2024 658th lifthrasiir 🇰🇷 667 48 2ms 29 Nov 2024 659th KatieLG 🇬🇧 666 84 10ms 19 Oct 2021 659th SomeKitten 🇺🇸 666 84 10ms 20 Aug 2022 659th mathisfun271 666 84 16ms 13 Feb 2024 659th qpwoeirut 666 84 9ms 18 Sep 2025 663rd stefangimmillaro 666 89 3,648ms 15 Nov 2024 664th boxjelly 666 103 114ms 6 Jan 2021 664th the-zammers 666 103 132ms 15 Dec 2023 664th Awsute 666 103 119ms 20 Aug 2024 667th weliveinhell 🇭🇹 665 72 9ms 30 Sep 2023 667th unfinishedprogram 665 72 8ms 27 Oct 2023 667th stefangimmillaro 665 72 9ms 12 Sep 2024 670th Secozzi 665 84 2ms 14 Mar 2021 670th madex 🇩🇪 665 84 2ms 2 Aug 2021 672nd kmathis22 665 106 451ms 11 days ago 673rd Shanethegamer 🇺🇸 663 95 80ms 13 Dec 2022 674th DialFrost 🇸🇬 662 149 265ms 29 Nov 2023 674th Yewzir 🇧🇪 662 149 285ms 3 Jan 2024 676th Yewzir 🇧🇪 662 153 2,381ms 8 May 2024 677th Yewzir 🇧🇪 659 84 2ms 28 Mar 2024 678th DialFrost 🇸🇬 657 96 90ms 27 May 2024 679th janbehrens 🇩🇪 656 69 332ms 9 Nov 2021 680th PsychoTea 656 98 333ms 21 Nov 2021 681st Attero 🇸🇪 655 68 207ms 6 Oct 2020 682nd MeWhenI 🇻🇦 653 49 34ms 28 Nov 2021 682nd emgordon154 653 49 2ms 18 Nov 2025 684th GolfingSuccess 🇬🇷 652 82 439ms 15 Jan 2024 685th plcc0 650 86 10ms 27 Mar 2025 686th marshallward 🇺🇸 650 96 39ms 8 Jul 2021 687th SirFireball3521 646 69 252ms 2 Mar 2023 688th edsrzf 🇳🇿 645 100 4ms 10 Nov 2024 689th HumanoidCPU 644 75 38ms 2 Jun 2024 690th MeWhenI 🇻🇦 644 89 5ms 18 Nov 2023 691st MeWhenI 🇻🇦 644 102 1,227ms 19 Jun 2023 692nd Shanethegamer 🇺🇸 644 153 285ms 26 Mar 2022 693rd geofft 643 87 9ms 12 Dec 2020 693rd programjames 643 87 10ms 7 May 2022 693rd jakobkordez 🇸🇮 643 87 11ms 28 Oct 2022 696th Shanethegamer 🇺🇸 642 87 1ms 4 Jan 2022 696th elgan65536 642 87 2ms 24 Oct 2023 698th Shanethegamer 🇺🇸 641 167 62ms 25 Jul 2021 699th Shanethegamer 🇺🇸 640 118 5ms 30 Aug 2024 700th alexsave 638 75 9ms 14 days ago 701st Shanethegamer 🇺🇸 638 126 147ms 13 Dec 2022 701st unfinishedprogram 638 126 149ms 23 Aug 2023 703rd Natanaelel 🇸🇪 637 70 228ms 8 Oct 2021 704th dloscutoff 637 71 368ms 27 Nov 2018 705th stefangimmillaro 637 98 38ms 23 Aug 2024 706th KatieLG 🇬🇧 636 84 329ms 15 Jan 2024 707th MeWhenI 🇻🇦 635 69 679ms 15 Sep 2025 708th zdzc 635 88 9ms 8 Feb 2018 708th nstearns96 🇬🇧 635 88 10ms 8 Dec 2022 708th TaserTheFox 🇺🇸 635 88 13ms 1 May 2023 708th snoozingnewt 🇨🇦 635 88 10ms 20 Nov 2025 708th FortuiteMan 🇫🇷 635 88 9ms 11 days ago 713th emgordon154 634 121 6ms 10 Sep 2025 714th DialFrost 🇸🇬 634 201 448ms 8 Mar 2025 715th Shanethegamer 🇺🇸 633 121 42ms 28 Sep 2024 716th madeforlosers 630 76 9ms 31 Oct 2023 717th emgordon154 630 94 4,729ms 4 Jul 2025 718th Lydxn 🇨🇦 629 112 373ms 5 Jan 2024 718th Shanethegamer 🇺🇸 629 112 435ms 25 Sep 2025 720th Yewzir 🇧🇪 628 72 319ms 26 May 2024 First Prev 641–720 of 2,057 Next Last