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 478th betaveros 736 76 10ms 31 Dec 2022 478th stertooy 🇧🇪 736 76 9ms 14 Jun 2024 478th moustave 736 76 10ms 15 Jul 2025 484th ovs-code 🇩🇪 735 76 2ms 3 Jun 2024 485th MeWhenI 🇻🇦 735 80 117ms 17 Nov 2022 486th retrohun 734 78 12ms 25 Sep 2022 487th MeWhenI 🇻🇦 733 174 461ms 9 Feb 2025 488th emgordon154 732 63 807ms 3 Jun 2025 489th Shanethegamer 🇺🇸 732 73 378ms 8 Oct 2024 490th MeWhenI 🇻🇦 731 88 332ms 17 Nov 2022 490th tomtheisen 🇺🇸 731 88 334ms 15 Dec 2022 492nd bstrat 727 44 2ms 19 Jun 2024 493rd SirBogman 🇺🇸 726 77 11ms 4 Dec 2022 493rd YAJUE114514 726 77 9ms 30 Jul 2025 493rd CornerMercury 🇬🇧 726 77 10ms 25 days ago 496th Irratix 🇳🇱 726 81 108ms 26 Dec 2020 497th tomtheisen 🇺🇸 725 66 10ms 12 Oct 2020 497th Attero 🇸🇪 725 66 9ms 21 Oct 2020 497th NewDefectus 🇮🇱 725 66 9ms 9 Nov 2021 497th Argeento 🇵🇱 725 66 9ms 28 Dec 2021 497th MeWhenI 🇻🇦 725 66 9ms 17 Nov 2022 497th GrayJoKing 🇦🇺 725 66 9ms 24 Jan 2023 497th Yax42 🇫🇷 725 66 9ms 13 Sep 2025 504th AlephSquirrel 725 77 2ms 25 May 2020 504th NewDefectus 🇮🇱 725 77 2ms 9 Nov 2021 504th lynn 725 77 2ms 30 Nov 2021 504th MeWhenI 🇻🇦 725 77 1ms 17 Nov 2022 504th BlankSpruce 725 77 2ms 8 Aug 2024 509th dpatterbee 725 136 275ms 23 Nov 2020 510th kg583 🇺🇸 724 106 8ms 30 Jul 2025 511th cure-honey 🇯🇵 724 111 124ms 10 Jul 2021 512th stefangimmillaro 723 93 100ms 20 Oct 2022 513th SirBogman 🇺🇸 723 95 115ms 17 Jun 2020 514th greghull 721 67 32ms 9 Nov 2017 514th Natanaelel 🇸🇪 721 67 36ms 2 Nov 2021 516th Shanethegamer 🇺🇸 721 100 374ms 13 Dec 2022 517th MeWhenI 🇻🇦 720 160 2ms 21 Apr 2024 518th juliansiebert 🇩🇪 719 67 222ms 1 Aug 2022 518th IISResetMe 719 67 260ms 7 Apr 2025 520th hoodadam 717 78 10ms 31 Jan 2020 520th hiddicop 🇸🇪 717 78 10ms 31 Jan 2021 520th sleepyStick 717 78 10ms 8 Dec 2021 520th annaproxy 717 78 11ms 6 Feb 2022 520th cubed-guy 717 78 10ms 12 Feb 2022 520th Fracture17 717 78 9ms 4 Apr 2023 520th commandblockguy 🇺🇸 717 78 10ms 7 Apr 2023 520th steffan-polygolf 717 78 10ms 21 Feb 2024 520th Yewzir 🇧🇪 717 78 10ms 5 Jun 2024 520th jatloe 717 78 9ms 29 Oct 2024 520th snydej 717 78 10ms 21 Nov 2024 520th Lv0Sys 🇵🇱 717 78 10ms 20 days ago 532nd ian-h-chamberlain 🇺🇸 717 112 153ms 16 Jan 2020 532nd stefangimmillaro 717 112 123ms 16 Nov 2024 532nd emgordon154 717 112 251ms 10 Sep 2025 535th prplz 🇦🇺 716 78 1ms 26 Apr 2019 535th Attero 🇸🇪 716 78 2ms 23 May 2020 535th Alex-x90 🇺🇸 716 78 2ms 24 Jan 2023 535th JohandeRuiter 🇳🇱 716 78 2ms 30 Nov 2023 539th janbehrens 🇩🇪 716 80 5ms 28 Nov 2023 540th CatsAreFluffy 715 58 53ms 18 Feb 2023 541st thisishowmymindworks 🇳🇴 714 67 9ms 9 Sep 2020 541st itsh01 714 67 9ms 4 Sep 2022 541st inventshah 714 67 9ms 23 Jan 2023 541st Alex-x90 🇺🇸 714 67 8ms 24 Jan 2023 541st helbling 🇨🇭 714 67 9ms 3 Jun 2024 546th kritixilithos 714 76 1ms 27 May 2024 547th stefangimmillaro 714 84 95ms 14 Mar 2023 548th GalladeGuy 🇺🇸 714 91 2ms 12 Apr 2019 548th Waffle3z 714 91 2ms 24 Oct 2020 550th BREMAUCY 🇫🇷 713 75 359ms 1 Nov 2025 551st chunes3 🇺🇸 713 100 72ms 17 Sep 2023 552nd JOrE20 🇺🇸 713 219 7ms 18 days ago 553rd janbehrens 🇩🇪 713 352 11ms 2 Aug 2023 554th Shanethegamer 🇺🇸 712 97 79ms 25 Oct 2022 555th emgordon154 712 179 473ms 11 Jul 2025 556th Natanaelel 🇸🇪 711 45 2ms 21 Jan 2022 556th Natanaelel 🇸🇪 711 45 36ms 22 Jan 2024 558th emgordon154 711 68 48ms 19 Nov 2025 559th Sp3000 🇦🇺 710 57 3ms 12 Jan 2024 560th Attero 🇸🇪 710 69 6ms 20 Sep 2023 First Prev 481–560 of 2,057 Next Last