The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Fibonacci 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 25 87ms 4 Jun 2021 1st primo-ppcg 🇹🇭 1,000 25 50ms 4 Jun 2021 1st radarek 🇵🇱 1,000 25 33ms 2 Feb 2022 1st sisyphus-ppcg 🇦🇺 1,000 25 50ms 2 Feb 2022 1st GrayJoKing 🇦🇺 1,000 25 32ms 24 Aug 2023 1st error256 1,000 25 43ms 10 May 2024 7th xsot 🇸🇬 962 26 45ms 22 Apr 2018 7th UladzimirSukharukau 962 26 46ms 9 May 2018 7th hrrs01 962 26 35ms 31 Jan 2019 7th janlelis 962 26 46ms 12 Apr 2019 7th prplz 🇦🇺 962 26 37ms 21 Dec 2019 7th dbdr 962 26 38ms 5 Jan 2020 7th nwellnhof 🇩🇪 962 26 40ms 15 Feb 2020 7th antimon2 🇯🇵 962 26 43ms 27 Jun 2020 7th KatieLG 🇬🇧 962 26 36ms 22 Sep 2020 7th hiddicop 🇸🇪 962 26 30ms 26 Jan 2021 7th NewDefectus 🇮🇱 962 26 41ms 6 Feb 2021 7th JayXon 🇺🇸 962 26 30ms 19 Feb 2021 7th MatheusAvellar 🇧🇷 962 26 36ms 6 May 2021 7th Shanethegamer 🇺🇸 962 26 35ms 21 May 2021 7th gilufin 962 26 35ms 30 May 2021 7th Irratix 🇳🇱 962 26 31ms 4 Jun 2021 7th stefangimmillaro 962 26 45ms 16 Jun 2021 7th mrondon8 962 26 35ms 5 Sep 2021 7th ovs-code 🇩🇪 962 26 38ms 18 Nov 2021 7th SirBogman 🇺🇸 962 26 35ms 20 Nov 2021 7th Natanaelel 🇸🇪 962 26 35ms 12 Dec 2021 7th MeWhenI 🇻🇦 962 26 35ms 6 Jan 2022 7th akshatj27 🇦🇶 962 26 36ms 11 Jan 2022 7th btnlq 962 26 40ms 1 Feb 2022 7th lynn 962 26 46ms 25 May 2022 7th Mortis66666 962 26 41ms 12 Jul 2022 7th 4hg 🇺🇸 962 26 42ms 14 Jul 2022 7th tkr-sh 🇰🇵 962 26 44ms 14 Jul 2022 7th Steffan153 🇫🇮 962 26 40ms 30 Jul 2022 7th OhmNomNom 962 26 42ms 14 Oct 2022 7th DialFrost 🇸🇬 962 26 34ms 2 Dec 2022 7th aksyristos 962 26 37ms 26 Jan 2023 7th m-tkach 🇺🇦 962 26 44ms 9 Feb 2023 7th AlephSquirrel 962 26 42ms 14 Apr 2023 7th snoozingnewt 🇨🇦 962 26 43ms 23 Sep 2023 7th FlyingPenguin223 962 26 54ms 16 Oct 2023 7th rniii 962 26 34ms 19 Oct 2023 7th sean-niemann 🇺🇸 962 26 40ms 3 Jan 2024 7th wlaud9 962 26 40ms 5 Feb 2024 7th olleicua 🇺🇸 962 26 45ms 15 Feb 2024 7th ngthanhtrung23 962 26 45ms 10 Mar 2024 7th neel11235813 962 26 44ms 26 Mar 2024 7th duckyluuk 🇳🇱 962 26 36ms 9 Apr 2024 7th pardouin 🇫🇷 962 26 34ms 4 Sep 2024 7th tatzyr 🇯🇵 962 26 51ms 3 Dec 2024 7th ndren 962 26 38ms 17 Dec 2024 7th plcc0 962 26 40ms 27 Mar 2025 7th AbrahamJLR 🇻🇪 962 26 37ms 14 Jun 2025 7th vishal-mohanty 962 26 34ms 24 Aug 2025 7th fuzzylojik-golf 🇺🇸 962 26 33ms 29 Aug 2025 7th beirigo 🇧🇷 962 26 34ms 23 Oct 2025 7th CornerMercury 🇬🇧 962 26 45ms 14 days ago 59th mirroredcat 926 27 40ms 1 Jun 2021 59th emgordon154 926 27 51ms 12 Dec 2021 59th jared-hughes 926 27 30ms 20 Sep 2022 59th aydamak 926 27 43ms 7 May 2024 63rd n1LS 893 28 49ms 26 Sep 2019 63rd osinsky 893 28 36ms 6 Nov 2019 63rd yzhs 🇩🇪 893 28 36ms 2 Feb 2020 63rd proton 🇩🇪 893 28 35ms 20 Jun 2020 63rd OddballGreg 893 28 40ms 26 Sep 2020 63rd Waffle3z 893 28 44ms 8 Oct 2020 63rd BBoehm 🇩🇪 893 28 44ms 26 Dec 2020 63rd SnowballSH 893 28 40ms 27 Jan 2021 63rd rak1507 🇬🇧 893 28 42ms 6 Feb 2021 63rd roor0 893 28 36ms 18 Mar 2021 63rd janbehrens 🇩🇪 893 28 30ms 24 Mar 2021 63rd davishyer 893 28 35ms 12 Apr 2021 63rd razetime 893 28 39ms 29 Apr 2021 63rd ytaki0801 🇯🇵 893 28 42ms 19 Jun 2021 63rd schachmattmatt 893 28 37ms 3 Oct 2021 63rd orthoplex 🇨🇽 893 28 41ms 29 Mar 2022 63rd scpchicken 🇵🇼 893 28 36ms 10 Jan 2023 63rd anter69 🇭🇺 893 28 50ms 9 Feb 2023 1–80 of 273 Next Last
