The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Arabic to Roman 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 primo-ppcg 🇹🇭 1,000 63 41ms 16 Aug 2019 2nd Lydxn 🇨🇦 875 72 80ms 6 Oct 2021 2nd radarek 🇵🇱 875 72 45ms 26 Dec 2024 2nd JayXon 🇺🇸 875 72 50ms 27 Dec 2024 2nd pardouin 🇫🇷 875 72 45ms 27 Aug 2025 6th xsot 🇸🇬 863 73 50ms 2 Jan 2021 6th Steffan153 🇫🇮 863 73 82ms 29 Aug 2024 8th nwellnhof 🇩🇪 840 75 43ms 28 Dec 2021 8th sean-niemann 🇺🇸 840 75 44ms 14 Aug 2025 10th SirBogman 🇺🇸 818 77 85ms 22 Jan 2024 11th MeWhenI 🇻🇦 768 82 92ms 7 Dec 2022 12th olivermrose 🇺🇸 759 83 56ms 19 Sep 2021 12th anter69 🇭🇺 759 83 49ms 12 Feb 2024 14th prplz 🇦🇺 750 84 88ms 17 Mar 2020 15th KatieLG 🇬🇧 724 87 51ms 2 Oct 2025 16th ovs-code 🇩🇪 716 88 51ms 22 Feb 2025 17th olleicua 🇺🇸 708 89 56ms 21 Feb 2025 18th tatzyr 🇯🇵 649 97 204ms 18 Dec 2024 19th sisyphus-ppcg 🇦🇺 643 98 47ms 25 Sep 2021 20th DialFrost 🇸🇬 636 99 43ms 15 Apr 2025 21st Shanethegamer 🇺🇸 624 101 80ms 4 Apr 2023 22nd stefangimmillaro 600 105 49ms 23 Feb 2023 23rd blaztoma 🇱🇹 543 116 58ms 13 Oct 2025 24th jared-hughes 534 118 45ms 12 Sep 2022 25th acornellier 529 119 60ms 11 Dec 2018 26th akshatj27 🇦🇶 521 121 119ms 11 Jan 2022 26th HumanoidCPU 521 121 47ms 10 Jun 2024 28th Andriamanitra 🇫🇮 512 123 46ms 1 Sep 2022 29th dokutan 508 124 43ms 9 Oct 2024 30th Waffle3z 492 128 62ms 17 Jan 2021 30th hugolgst 492 128 47ms 4 Jun 2021 32nd vonagam 488 129 48ms 12 Nov 2017 33rd Haksell 🇦🇶 485 130 45ms 5 Apr 2020 33rd SephQ 485 130 52ms 7 Feb 2021 33rd Natanaelel 🇸🇪 485 130 44ms 7 May 2025 36th hrrs01 467 135 44ms 21 Sep 2018 36th sapphyrus 467 135 48ms 18 Feb 2020 38th kieraneglin 463 136 52ms 8 Nov 2017 38th proton 🇩🇪 463 136 54ms 5 Jun 2020 38th hiddicop 🇸🇪 463 136 44ms 26 Jan 2021 41st TheZwierzLF 🇵🇱 460 137 77ms 5 days ago 42nd jaredcrystal 🇺🇸 457 138 41ms 15 Dec 2020 43rd adoxography 438 144 41ms 8 Sep 2018 44th biinari 434 145 39ms 26 Mar 2018 45th michaelbaudino 432 146 43ms 19 Oct 2020 45th Just4FunCoder 432 146 121ms 18 Jun 2025 47th iamsolarpowered 414 152 48ms 5 Dec 2017 48th etzrxd 412 153 39ms 25 Aug 2023 49th aaronze 🇦🇺 399 158 43ms 17 Sep 2023 50th Ailko 🇧🇪 362 174 47ms 3 Feb 2023 50th paul-c-hartman 362 174 48ms 8 Mar 2025 52nd PikeIt 360 175 42ms 26 Jun 2023 53rd boxjelly 342 184 41ms 12 Feb 2021 54th ngthanhtrung23 335 188 42ms 7 Mar 2024 55th ndren 333 189 107ms 7 Aug 2023 56th aksyristos 310 203 45ms 4 Sep 2024 57th n1LS 307 205 45ms 2 Oct 2019 58th atsushiootani 128 492 42ms 1 Nov 2018 59th KatieLG-Transpiler 🇬🇧 1 76,979 527ms 5 Nov 2022 1–59 of 59
