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 561st Sp3000 🇦🇺 699 55 3ms 12 Jan 2024 562nd buddy1616 699 77 1ms 26 Apr 2019 562nd ktiy 699 77 2ms 2 Jun 2021 562nd m-tkach 🇺🇦 699 77 2ms 15 Dec 2022 565th typeswitch-dev 🇵🇹 699 101 3ms 28 Jul 2023 566th SirBogman 🇺🇸 699 356 11ms 23 Nov 2022 567th Natanaelel 🇸🇪 698 43 2ms 21 Jan 2022 567th Natanaelel 🇸🇪 698 43 36ms 22 Jan 2024 569th MeWhenI 🇻🇦 697 52 2ms 26 May 2023 570th AlephSquirrel 697 70 525ms 21 Jan 2024 570th HumanoidCPU 697 70 385ms 11 Feb 2025 570th albanian-laundromat 697 70 365ms 11 Nov 2025 573rd hoodadam 697 76 10ms 31 Jan 2020 573rd hiddicop 🇸🇪 697 76 10ms 31 Jan 2021 573rd sleepyStick 697 76 10ms 8 Dec 2021 573rd cubed-guy 697 76 10ms 12 Feb 2022 573rd Fracture17 697 76 9ms 4 Apr 2023 573rd Jacob385 697 76 9ms 14 Mar 2024 573rd stertooy 🇧🇪 697 76 9ms 14 Jun 2024 573rd jatloe 697 76 9ms 29 Oct 2024 573rd snydej 697 76 10ms 21 Nov 2024 573rd moustave 697 76 10ms 10 Apr 2025 573rd RYSF13 🇨🇳 697 76 9ms 18 Jul 2025 573rd Lv0Sys 🇵🇱 697 76 10ms 20 days ago 585th cywong-amino 🇭🇰 695 66 9ms 30 May 2020 585th dmrichwa 🇺🇸 695 66 9ms 22 Jan 2023 585th kcinnu 🇱🇹 695 66 9ms 15 Nov 2023 588th Ripick 694 101 271ms 21 May 2023 589th s-g-stavely 692 91 2ms 12 May 2021 590th Shanethegamer 🇺🇸 692 92 1,278ms 9 Mar 2023 591st MeWhenI 🇻🇦 691 68 4ms 3 Jul 2023 592nd janbehrens 🇩🇪 691 152 25ms 8 Jul 2021 593rd foxmcloud555 690 78 2ms 28 Apr 2022 593rd aksyristos 690 78 2ms 10 Feb 2023 593rd neel11235813 690 78 1ms 14 Mar 2023 593rd klixel 🇨🇦 690 78 2ms 7 Jun 2023 593rd Herbert00709 🇵🇱 690 78 2ms 23 Nov 2024 593rd TeodorDyakov 🇧🇬 690 78 1ms 23 Sep 2025 599th MeWhenI 🇻🇦 690 83 3,677ms 27 Oct 2024 599th pardouin 🇫🇷 690 83 3,879ms 12 Nov 2024 599th aditsu 690 83 3,699ms 13 Aug 2025 602nd cure-honey 🇯🇵 690 84 79ms 10 Jul 2021 603rd Feniske 🇫🇷 689 67 250ms 10 Nov 2023 604th RYNO8 688 77 11ms 11 Sep 2021 604th NewDefectus 🇮🇱 688 77 9ms 9 Nov 2021 604th jeff-at-tamer-dot-codes 🇺🇸 688 77 10ms 13 Mar 2023 604th fourth-bit 688 77 10ms 23 Sep 2024 604th Pyroan 688 77 9ms 22 Feb 2025 604th wuduculfre 688 77 9ms 22 Jul 2025 604th cros107 🇦🇺 688 77 9ms 12 days ago 611th edsrzf 🇳🇿 688 106 8ms 8 Jan 2025 612th greghull 685 65 32ms 9 Nov 2017 612th Natanaelel 🇸🇪 685 65 36ms 2 Nov 2021 614th rucin93 🇵🇱 684 53 3ms 11 Jul 2024 615th kritixilithos 683 74 1ms 27 May 2024 616th Shanethegamer 🇺🇸 682 107 10ms 19 Dec 2023 617th Shanethegamer 🇺🇸 681 97 35ms 14 Jun 2022 618th MeWhenI 🇻🇦 681 103 72ms 2 Nov 2023 619th bforte 680 98 113ms 21 Dec 2018 620th namelessiw 679 78 9ms 6 May 2024 621st Shanethegamer 🇺🇸 677 93 2ms 23 Jul 2021 622nd Shanethegamer 🇺🇸 677 105 451ms 4 Jan 2022 623rd elgan65536 675 116 134ms 23 Oct 2023 624th emgordon154 674 66 48ms 19 Nov 2025 625th XenThe 🇬🇧 674 68 9ms 14 Jun 2025 626th 09cf 673 80 2ms 17 days ago 627th annaproxy 673 88 63ms 11 Dec 2022 628th snoozingnewt 🇨🇦 673 92 79ms 23 Oct 2025 629th yzhs 🇩🇪 673 99 113ms 18 Jan 2020 630th cure-honey 🇯🇵 672 63 291ms 15 Jul 2021 631st Shanethegamer 🇺🇸 672 93 4ms 19 Oct 2024 632nd MeWhenI 🇻🇦 671 78 2ms 12 Nov 2022 633rd argusdusty 🇺🇸 670 79 10ms 31 Dec 2020 633rd scpchicken 🇵🇼 670 79 10ms 13 Mar 2022 633rd mathb0y512 670 79 11ms 24 Nov 2022 633rd Bulmenisaurus 670 79 10ms 5 Jan 2025 633rd InigoK 🇺🇸 670 79 10ms 22 Sep 2025 638th SmartK8 🇨🇿 670 93 351ms 29 Oct 2022 639th bluebear94 668 53 129ms 12 Feb 2018 640th Shanethegamer 🇺🇸 668 66 1,108ms 2 Jul 2021 First Prev 561–640 of 2,037 Next Last