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 481st MeWhenI 🇻🇦 730 172 461ms 9 Feb 2025 482nd itsh01 728 63 9ms 4 Sep 2022 482nd Maznek 728 63 10ms 25 Jun 2023 484th Shanethegamer 🇺🇸 728 67 371ms 16 Jan 2024 484th bizy-coder 728 67 345ms 17 Jan 2024 484th MeWhenI 🇻🇦 728 67 337ms 17 Jan 2024 484th KatieLG 🇬🇧 728 67 376ms 28 Oct 2024 488th MeWhenI 🇻🇦 728 78 117ms 17 Nov 2022 489th retrohun 727 76 12ms 25 Sep 2022 490th vishwathg 725 73 10ms 3 Apr 2023 490th janbehrens 🇩🇪 725 73 10ms 28 Nov 2023 490th dirckvdende 725 73 9ms 18 Jul 2025 493rd MeWhenI 🇻🇦 724 86 332ms 17 Nov 2022 494th emgordon154 723 61 807ms 3 Jun 2025 495th Yewzir 🇧🇪 723 101 8ms 24 Dec 2023 496th lynn 722 82 8ms 8 Dec 2021 497th dpatterbee 721 134 275ms 23 Nov 2020 498th Irratix 🇳🇱 719 79 108ms 26 Dec 2020 499th cure-honey 🇯🇵 719 109 124ms 10 Jul 2021 500th MeWhenI 🇻🇦 719 160 2ms 21 Apr 2024 501st vonagam 718 62 35ms 9 Nov 2017 501st Waffle3z 718 62 39ms 22 Jan 2021 501st yzhs 🇩🇪 718 62 35ms 20 Jul 2022 504th AlephSquirrel 718 75 2ms 25 May 2020 504th NewDefectus 🇮🇱 718 75 2ms 9 Nov 2021 504th lynn 718 75 2ms 30 Nov 2021 504th MeWhenI 🇻🇦 718 75 1ms 17 Nov 2022 504th BlankSpruce 718 75 2ms 8 Aug 2024 509th tomtheisen 🇺🇸 717 64 10ms 12 Oct 2020 509th Attero 🇸🇪 717 64 9ms 21 Oct 2020 509th NewDefectus 🇮🇱 717 64 9ms 9 Nov 2021 509th Argeento 🇵🇱 717 64 9ms 28 Dec 2021 509th MeWhenI 🇻🇦 717 64 9ms 17 Nov 2022 509th GrayJoKing 🇦🇺 717 64 9ms 24 Jan 2023 509th Yax42 🇫🇷 717 64 9ms 13 Sep 2025 516th stefangimmillaro 717 91 100ms 20 Oct 2022 517th SirBogman 🇺🇸 717 93 115ms 17 Jun 2020 518th JOrE20 🇺🇸 717 215 7ms 17 days ago 519th MeWhenI 🇻🇦 716 73 131ms 3 Aug 2024 520th daedals 716 74 10ms 14 May 2019 520th petar-donchev 716 74 10ms 8 Sep 2019 520th jared-hughes 716 74 9ms 10 Sep 2022 520th betaveros 716 74 10ms 31 Dec 2022 520th stefangimmillaro 716 74 10ms 11 Mar 2023 520th BREMAUCY 🇫🇷 716 74 10ms 1 Nov 2025 526th Shanethegamer 🇺🇸 715 98 374ms 13 Dec 2022 527th bstrat 714 42 2ms 19 Jun 2024 528th ian-h-chamberlain 🇺🇸 712 110 153ms 16 Jan 2020 528th stefangimmillaro 712 110 123ms 16 Nov 2024 528th emgordon154 712 110 251ms 10 Sep 2025 531st janbehrens 🇩🇪 711 350 11ms 2 Aug 2023 532nd juliansiebert 🇩🇪 710 65 222ms 1 Aug 2022 532nd IISResetMe 710 65 260ms 7 Apr 2025 534th janbehrens 🇩🇪 709 78 5ms 28 Nov 2023 535th emgordon154 709 177 473ms 11 Jul 2025 536th prplz 🇦🇺 708 76 1ms 26 Apr 2019 536th Attero 🇸🇪 708 76 2ms 23 May 2020 536th Alex-x90 🇺🇸 708 76 2ms 24 Jan 2023 536th JohandeRuiter 🇳🇱 708 76 2ms 30 Nov 2023 540th GalladeGuy 🇺🇸 708 89 2ms 12 Apr 2019 540th Waffle3z 708 89 2ms 24 Oct 2020 542nd snoozingnewt 🇨🇦 707 69 373ms 20 Nov 2025 543rd stefangimmillaro 707 82 95ms 14 Mar 2023 544th DialFrost 🇸🇬 706 60 2,299ms 31 Dec 2023 545th janbehrens 🇩🇪 706 63 42ms 30 May 2022 545th tatzyr 🇯🇵 706 63 52ms 25 Nov 2024 547th thisishowmymindworks 🇳🇴 706 65 9ms 9 Sep 2020 547th inventshah 706 65 9ms 23 Jan 2023 547th Alex-x90 🇺🇸 706 65 8ms 24 Jan 2023 547th helbling 🇨🇭 706 65 9ms 3 Jun 2024 551st yzhs 🇩🇪 706 75 10ms 25 Oct 2020 551st SB-945 706 75 10ms 7 Apr 2024 551st dokutan 706 75 10ms 15 May 2024 551st YAJUE114514 706 75 9ms 30 Jul 2025 551st blaztoma 🇱🇹 706 75 9ms 26 days ago 556th clockworknazo 702 98 3ms 6 Mar 2023 557th chunes3 🇺🇸 702 100 72ms 17 Sep 2023 558th Attero 🇸🇪 701 67 6ms 20 Sep 2023 559th flawr 701 95 115ms 24 Feb 2019 560th Sp3000 🇦🇺 699 55 3ms 12 Jan 2024 First Prev 481–560 of 2,036 Next Last