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 sean-niemann 🇺🇸 730 58 262ms 1 Jan 2024 482nd MeWhenI 🇻🇦 730 172 461ms 9 Feb 2025 483rd itsh01 728 63 9ms 4 Sep 2022 483rd Maznek 728 63 10ms 25 Jun 2023 485th Shanethegamer 🇺🇸 728 67 371ms 16 Jan 2024 485th bizy-coder 728 67 345ms 17 Jan 2024 485th MeWhenI 🇻🇦 728 67 337ms 17 Jan 2024 485th KatieLG 🇬🇧 728 67 376ms 28 Oct 2024 489th MeWhenI 🇻🇦 728 78 117ms 17 Nov 2022 490th retrohun 727 76 12ms 25 Sep 2022 491st vishwathg 725 73 10ms 3 Apr 2023 491st janbehrens 🇩🇪 725 73 10ms 28 Nov 2023 491st dirckvdende 725 73 9ms 18 Jul 2025 494th MeWhenI 🇻🇦 724 86 332ms 17 Nov 2022 495th emgordon154 723 61 807ms 3 Jun 2025 496th Yewzir 🇧🇪 723 101 8ms 24 Dec 2023 497th lynn 722 82 8ms 8 Dec 2021 498th dpatterbee 721 134 275ms 23 Nov 2020 499th Irratix 🇳🇱 719 79 108ms 26 Dec 2020 500th cure-honey 🇯🇵 719 109 124ms 10 Jul 2021 501st MeWhenI 🇻🇦 719 160 2ms 21 Apr 2024 502nd vonagam 718 62 35ms 9 Nov 2017 502nd Waffle3z 718 62 39ms 22 Jan 2021 502nd yzhs 🇩🇪 718 62 35ms 20 Jul 2022 505th AlephSquirrel 718 75 2ms 25 May 2020 505th NewDefectus 🇮🇱 718 75 2ms 9 Nov 2021 505th lynn 718 75 2ms 30 Nov 2021 505th MeWhenI 🇻🇦 718 75 1ms 17 Nov 2022 505th BlankSpruce 718 75 2ms 8 Aug 2024 510th tomtheisen 🇺🇸 717 64 10ms 12 Oct 2020 510th Attero 🇸🇪 717 64 9ms 21 Oct 2020 510th NewDefectus 🇮🇱 717 64 9ms 9 Nov 2021 510th Argeento 🇵🇱 717 64 9ms 28 Dec 2021 510th MeWhenI 🇻🇦 717 64 9ms 17 Nov 2022 510th GrayJoKing 🇦🇺 717 64 9ms 24 Jan 2023 510th Yax42 🇫🇷 717 64 9ms 13 Sep 2025 517th stefangimmillaro 717 91 100ms 20 Oct 2022 518th SirBogman 🇺🇸 717 93 115ms 17 Jun 2020 519th JOrE20 🇺🇸 717 215 7ms 18 days ago 520th MeWhenI 🇻🇦 716 73 131ms 3 Aug 2024 521st daedals 716 74 10ms 14 May 2019 521st petar-donchev 716 74 10ms 8 Sep 2019 521st jared-hughes 716 74 9ms 10 Sep 2022 521st betaveros 716 74 10ms 31 Dec 2022 521st stefangimmillaro 716 74 10ms 11 Mar 2023 521st BREMAUCY 🇫🇷 716 74 10ms 1 Nov 2025 527th Shanethegamer 🇺🇸 715 98 374ms 13 Dec 2022 528th bstrat 714 42 2ms 19 Jun 2024 529th ian-h-chamberlain 🇺🇸 712 110 153ms 16 Jan 2020 529th stefangimmillaro 712 110 123ms 16 Nov 2024 529th emgordon154 712 110 251ms 10 Sep 2025 532nd janbehrens 🇩🇪 711 350 11ms 2 Aug 2023 533rd juliansiebert 🇩🇪 710 65 222ms 1 Aug 2022 533rd IISResetMe 710 65 260ms 7 Apr 2025 535th janbehrens 🇩🇪 709 78 5ms 28 Nov 2023 536th emgordon154 709 177 473ms 11 Jul 2025 537th prplz 🇦🇺 708 76 1ms 26 Apr 2019 537th Attero 🇸🇪 708 76 2ms 23 May 2020 537th Alex-x90 🇺🇸 708 76 2ms 24 Jan 2023 537th JohandeRuiter 🇳🇱 708 76 2ms 30 Nov 2023 541st GalladeGuy 🇺🇸 708 89 2ms 12 Apr 2019 541st Waffle3z 708 89 2ms 24 Oct 2020 543rd janbehrens 🇩🇪 707 63 42ms 30 May 2022 543rd tatzyr 🇯🇵 707 63 52ms 25 Nov 2024 545th snoozingnewt 🇨🇦 707 69 373ms 20 Nov 2025 546th stefangimmillaro 707 82 95ms 14 Mar 2023 547th DialFrost 🇸🇬 706 60 2,299ms 31 Dec 2023 548th thisishowmymindworks 🇳🇴 706 65 9ms 9 Sep 2020 548th inventshah 706 65 9ms 23 Jan 2023 548th Alex-x90 🇺🇸 706 65 8ms 24 Jan 2023 548th helbling 🇨🇭 706 65 9ms 3 Jun 2024 552nd yzhs 🇩🇪 706 75 10ms 25 Oct 2020 552nd SB-945 706 75 10ms 7 Apr 2024 552nd dokutan 706 75 10ms 15 May 2024 552nd YAJUE114514 706 75 9ms 30 Jul 2025 552nd blaztoma 🇱🇹 706 75 9ms 26 days ago 557th clockworknazo 702 98 3ms 6 Mar 2023 558th chunes3 🇺🇸 702 100 72ms 17 Sep 2023 559th Attero 🇸🇪 701 67 6ms 20 Sep 2023 560th flawr 701 95 115ms 24 Feb 2019 First Prev 481–560 of 2,037 Next Last