The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Roman to Arabic 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 sisyphus-ppcg 🇦🇺 1,000 50 38ms 6 Apr 2021 2nd primo-ppcg 🇹🇭 962 52 46ms 1 Sep 2018 3rd radarek 🇵🇱 909 55 63ms 26 Dec 2024 3rd JayXon 🇺🇸 909 55 76ms 27 Dec 2024 3rd pardouin 🇫🇷 909 55 71ms 11 Aug 2025 6th Lydxn 🇨🇦 893 56 68ms 10 Oct 2021 6th sean-niemann 🇺🇸 893 56 61ms 1 Jul 2022 6th MeWhenI 🇻🇦 893 56 65ms 3 Aug 2022 6th Steffan153 🇫🇮 893 56 65ms 28 Nov 2022 10th nwellnhof 🇩🇪 877 57 48ms 28 Dec 2021 11th Shanethegamer 🇺🇸 862 58 46ms 23 Feb 2022 11th Babafaba 862 58 43ms 5 Nov 2025 13th anter69 🇭🇺 847 59 76ms 13 Feb 2024 13th AbrahamJLR 🇻🇪 847 59 46ms 30 Jul 2025 15th stefangimmillaro 833 60 41ms 26 Dec 2024 15th xsot 🇸🇬 833 60 49ms 3 Feb 2025 15th ovs-code 🇩🇪 833 60 42ms 22 Feb 2025 18th DialFrost 🇸🇬 820 61 40ms 26 Dec 2024 18th m-tkach 🇺🇦 820 61 44ms 26 Dec 2024 18th KatieLG 🇬🇧 820 61 42ms 2 Oct 2025 21st GrayJoKing 🇦🇺 806 62 43ms 24 Feb 2022 21st akshatj27 🇦🇶 806 62 48ms 5 Mar 2022 21st scpchicken 🇵🇼 806 62 48ms 5 Mar 2022 21st Irratix 🇳🇱 806 62 47ms 22 Mar 2022 21st prplz 🇦🇺 806 62 42ms 8 Jun 2022 21st Natanaelel 🇸🇪 806 62 46ms 16 Feb 2023 27th dokutan 794 63 51ms 20 Apr 2025 28th 4hg 🇺🇸 769 65 43ms 25 Jan 2023 29th SirBogman 🇺🇸 758 66 40ms 20 Mar 2022 30th blaztoma 🇱🇹 714 70 51ms 22 Nov 2025 31st CaedenHarper 🇨🇦 641 78 43ms 18 Aug 2025 32nd olivermrose 🇺🇸 633 79 88ms 24 Oct 2021 33rd hiddicop 🇸🇪 543 92 56ms 1 Feb 2021 33rd jared-hughes 543 92 49ms 20 Sep 2022 35th tatzyr 🇯🇵 532 94 154ms 28 Dec 2024 36th olleicua 🇺🇸 495 101 114ms 25 Feb 2025 37th Waffle3z 476 105 73ms 22 Jan 2021 38th hrrs01 463 108 54ms 29 Jan 2018 39th yzhs 🇩🇪 459 109 43ms 20 Jul 2022 40th yokasuretsu 455 110 42ms 30 Apr 2018 41st Haksell 🇦🇶 450 111 45ms 22 Feb 2023 42nd proton 🇩🇪 410 122 72ms 8 Jun 2020 43rd SephQ 400 125 46ms 9 Feb 2021 44th robymus 397 126 43ms 18 Sep 2018 44th gilufin 397 126 109ms 19 Jan 2022 46th Andriamanitra 🇫🇮 385 130 56ms 18 Jun 2025 47th vonagam 382 131 69ms 12 Nov 2017 48th atsushiootani 373 134 47ms 1 Nov 2018 49th jmerle 🇳🇱 360 139 70ms 21 Jun 2023 50th segiddins 345 145 43ms 24 Aug 2018 51st biinari 342 146 45ms 2 Apr 2018 52nd adoxography 299 167 64ms 6 Jun 2018 53rd jaredcrystal 🇺🇸 262 191 51ms 9 Oct 2019 54th aksyristos 254 197 91ms 31 Jan 2023 55th n1LS 236 212 61ms 2 Oct 2019 56th HumanoidCPU 167 300 47ms 9 Jun 2024 57th KatieLG-Transpiler 🇬🇧 1 76,979 551ms 5 Nov 2022 1–57 of 57
