The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Leyland Numbers in Ruby 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 1st Lydxn 🇨🇦 1,000 44 46ms 19 Aug 2022 2nd pardouin 🇫🇷 898 49 39ms 17 Sep 2025 2nd radarek 🇵🇱 898 49 45ms 17 Sep 2025 4th janlelis 863 51 47ms 11 Nov 2021 5th m-tkach 🇺🇦 846 52 39ms 23 Aug 2023 6th Steffan153 🇫🇮 815 54 41ms 29 Aug 2024 6th sean-niemann 🇺🇸 815 54 40ms 12 Oct 2025 8th JayXon 🇺🇸 800 55 306ms 9 Jan 2022 8th MeWhenI 🇻🇦 800 55 43ms 16 Aug 2022 8th anter69 🇭🇺 800 55 41ms 25 Jan 2023 8th ovs-code 🇩🇪 800 55 37ms 22 Jan 2025 12th prplz 🇦🇺 786 56 73ms 28 Jul 2020 12th primo-ppcg 🇹🇭 786 56 164ms 15 Sep 2020 14th nwellnhof 🇩🇪 772 57 39ms 28 Oct 2021 14th GrayJoKing 🇦🇺 772 57 60ms 30 Nov 2023 14th DialFrost 🇸🇬 772 57 190ms 1 Jun 2024 17th olivermrose 🇺🇸 759 58 42ms 3 Oct 2021 17th stefangimmillaro 759 58 40ms 27 Oct 2021 17th SirBogman 🇺🇸 759 58 40ms 8 Jun 2022 17th sisyphus-ppcg 🇦🇺 759 58 40ms 11 Jul 2022 17th tatzyr 🇯🇵 759 58 45ms 24 Nov 2024 17th KatieLG 🇬🇧 759 58 35ms 2 Oct 2025 23rd hiddicop 🇸🇪 746 59 44ms 29 Jan 2021 23rd Shanethegamer 🇺🇸 746 59 39ms 16 Feb 2023 23rd BREMAUCY 🇫🇷 746 59 40ms 21 May 2023 23rd Natanaelel 🇸🇪 746 59 40ms 15 Jan 2024 23rd snoozingnewt 🇨🇦 746 59 36ms 2 Oct 2025 28th Andriamanitra 🇫🇮 733 60 45ms 26 Jul 2023 28th olleicua 🇺🇸 733 60 53ms 23 Apr 2025 30th akshatj27 🇦🇶 721 61 43ms 11 Jan 2022 30th orthoplex 🇨🇽 721 61 41ms 1 Apr 2022 30th OhmNomNom 721 61 37ms 14 Oct 2022 33rd emgordon154 710 62 40ms 13 Nov 2021 33rd jared-hughes 710 62 40ms 20 Sep 2022 35th Waffle3z 688 64 53ms 22 Jan 2021 36th FlyingPenguin223 667 66 40ms 11 Nov 2024 37th Lv0Sys 🇵🇱 657 67 57ms 21 days ago 38th dokutan 629 70 35ms 18 Apr 2025 39th TheZwierzLF 🇵🇱 611 72 234ms 11 hours ago 40th adoxography 603 73 44ms 8 Oct 2020 40th lacrosse 603 73 37ms 27 days ago 42nd Irratix 🇳🇱 595 74 46ms 27 Jun 2022 43rd proton 🇩🇪 587 75 41ms 30 Oct 2020 43rd eggplants 🇯🇵 587 75 46ms 26 Nov 2020 43rd schachmattmatt 587 75 37ms 2 Oct 2021 43rd annaproxy 587 75 49ms 19 Sep 2023 47th fynnkroeger 524 84 47ms 8 Feb 2021 48th boxjelly 518 85 49ms 12 Feb 2021 49th nckraghu 512 86 38ms 29 Sep 2021 50th msbranicky 344 128 43ms 18 Oct 2023 51st HumanoidCPU 94 468 36ms 10 Jan 2025 52nd JRaspass 🇬🇧 49 891 37ms 12 Oct 2020 52nd jaredcrystal 🇺🇸 49 891 39ms 9 Dec 2020 52nd KatieLG-Transpiler 🇬🇧 49 891 39ms 24 Jun 2022 52nd retrohun 49 891 38ms 28 Dec 2022 52nd Haksell 🇦🇶 49 891 41ms 23 Feb 2023 52nd Mabeloid 🇳🇴 49 891 36ms 22 Sep 2024 52nd CaedenHarper 🇨🇦 49 891 39ms 16 Aug 2025 1–58 of 58