The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Factorial Factorisation 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 Steffan153 🇫🇮 1,000 62 74ms 13 Apr 2024 1st sean-niemann 🇺🇸 1,000 62 69ms 24 Dec 2024 1st JayXon 🇺🇸 1,000 62 51ms 27 Dec 2024 1st radarek 🇵🇱 1,000 62 45ms 27 Dec 2024 5th xsot 🇸🇬 984 63 51ms 13 Apr 2024 5th janlelis 984 63 66ms 6 Jan 2025 7th anter69 🇭🇺 969 64 47ms 25 Oct 2024 8th pardouin 🇫🇷 954 65 307ms 9 Sep 2025 9th plcc0 899 69 45ms 4 Oct 2025 10th tatzyr 🇯🇵 886 70 48ms 30 Dec 2024 10th KatieLG 🇬🇧 886 70 43ms 2 Oct 2025 12th Natanaelel 🇸🇪 861 72 51ms 13 Apr 2024 12th ovs-code 🇩🇪 861 72 48ms 13 Apr 2024 12th nwellnhof 🇩🇪 861 72 47ms 22 Apr 2024 12th sisyphus-ppcg 🇦🇺 861 72 68ms 5 Jan 2025 12th error256 861 72 52ms 26 hours ago 17th TFeld00 🇩🇰 849 73 50ms 3 Sep 2024 18th SirBogman 🇺🇸 827 75 52ms 18 Apr 2024 19th D-MOVE 🇵🇭 816 76 49ms 17 days ago 20th GrayJoKing 🇦🇺 795 78 40ms 16 Apr 2024 21st DialFrost 🇸🇬 775 80 46ms 2 Jun 2024 22nd blaztoma 🇱🇹 765 81 51ms 12 Oct 2025 22nd lacrosse 765 81 45ms 27 days ago 24th stefangimmillaro 747 83 47ms 13 Apr 2024 24th MeWhenI 🇻🇦 747 83 41ms 29 Dec 2024 26th Shanethegamer 🇺🇸 729 85 52ms 13 Apr 2024 26th Just4FunCoder 729 85 43ms 18 Jun 2025 28th olleicua 🇺🇸 713 87 56ms 23 Apr 2024 29th TheZwierzLF 🇵🇱 689 90 51ms 5 days ago 30th neel11235813 674 92 46ms 14 Apr 2024 31st BREMAUCY 🇫🇷 667 93 51ms 15 Apr 2024 32nd beergit 534 116 48ms 7 Aug 2024 33rd adoxography 508 122 44ms 27 Apr 2024 34th emgordon154 434 143 53ms 26 Jul 2024 35th LostSyntax21 🇬🇧 425 146 45ms 23 Aug 2024 36th msbranicky 392 158 48ms 16 Apr 2024 37th madex 🇩🇪 246 252 48ms 15 Apr 2024 38th dokutan 196 316 36ms 1 Apr 2025 39th bac0id 182 341 35ms 26 Jun 2024 40th HumanoidCPU 136 456 48ms 10 Jan 2025 41st Yewzir 🇧🇪 72 867 39ms 13 Apr 2024 41st Mabeloid 🇳🇴 72 867 36ms 17 Sep 2024 41st CaedenHarper 🇨🇦 72 867 44ms 22 Jan 2025 44th KatieLG-Transpiler 🇬🇧 71 873 38ms 16 Aug 2024 1–44 of 44