The Calendar hole will go live in approximately 12 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 79ms 13 Apr 2024 1st sean-niemann 🇺🇸 1,000 62 64ms 24 Dec 2024 1st JayXon 🇺🇸 1,000 62 64ms 27 Dec 2024 1st radarek 🇵🇱 1,000 62 57ms 27 Dec 2024 5th xsot 🇸🇬 984 63 49ms 13 Apr 2024 5th janlelis 984 63 63ms 6 Jan 2025 7th anter69 🇭🇺 969 64 61ms 25 Oct 2024 8th pardouin 🇫🇷 954 65 467ms 9 Sep 2025 9th plcc0 899 69 49ms 4 Oct 2025 10th tatzyr 🇯🇵 886 70 57ms 30 Dec 2024 10th KatieLG 🇬🇧 886 70 45ms 2 Oct 2025 12th Natanaelel 🇸🇪 861 72 55ms 13 Apr 2024 12th ovs-code 🇩🇪 861 72 45ms 13 Apr 2024 12th nwellnhof 🇩🇪 861 72 45ms 22 Apr 2024 12th sisyphus-ppcg 🇦🇺 861 72 68ms 5 Jan 2025 16th TFeld00 🇩🇰 849 73 48ms 3 Sep 2024 17th SirBogman 🇺🇸 827 75 56ms 18 Apr 2024 18th D-MOVE 🇵🇭 816 76 48ms 10 days ago 19th GrayJoKing 🇦🇺 795 78 41ms 16 Apr 2024 20th error256 775 80 48ms 1 May 2024 20th DialFrost 🇸🇬 775 80 58ms 2 Jun 2024 22nd blaztoma 🇱🇹 765 81 62ms 12 Oct 2025 22nd lacrosse 765 81 70ms 20 days ago 24th stefangimmillaro 747 83 48ms 13 Apr 2024 24th MeWhenI 🇻🇦 747 83 61ms 29 Dec 2024 26th Shanethegamer 🇺🇸 729 85 54ms 13 Apr 2024 26th Just4FunCoder 729 85 41ms 18 Jun 2025 28th olleicua 🇺🇸 713 87 57ms 23 Apr 2024 29th neel11235813 674 92 46ms 14 Apr 2024 30th BREMAUCY 🇫🇷 667 93 45ms 15 Apr 2024 31st beergit 534 116 66ms 7 Aug 2024 32nd adoxography 508 122 46ms 27 Apr 2024 33rd emgordon154 434 143 55ms 26 Jul 2024 34th LostSyntax21 🇬🇧 425 146 37ms 23 Aug 2024 35th msbranicky 392 158 64ms 16 Apr 2024 36th TheZwierzLF 🇵🇱 343 181 64ms 2 days ago 37th madex 🇩🇪 246 252 45ms 15 Apr 2024 38th dokutan 196 316 37ms 1 Apr 2025 39th bac0id 182 341 40ms 26 Jun 2024 40th HumanoidCPU 136 456 43ms 10 Jan 2025 41st Yewzir 🇧🇪 72 867 36ms 13 Apr 2024 41st Mabeloid 🇳🇴 72 867 32ms 17 Sep 2024 41st CaedenHarper 🇨🇦 72 867 40ms 22 Jan 2025 44th KatieLG-Transpiler 🇬🇧 71 873 38ms 16 Aug 2024 1–44 of 44