The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Fibonacci in Bash in bytes. 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 Bytes Time Submitted 80th niKK3 545 55 4ms 16 Nov 2018 80th sech1p 🇵🇱 545 55 2ms 2 Jul 2021 80th eiburns 545 55 2ms 19 Jan 2023 80th Upload-and-View 🇺🇦 545 55 2ms 21 Aug 2025 80th jacekwladzinski 545 55 2ms 2 Oct 2025 80th vhoulbreque 🇫🇷 545 55 3ms 20 days ago 87th yzhs 🇩🇪 536 56 2ms 1 Feb 2020 87th geofft 536 56 1ms 11 Dec 2020 87th ze-h 🇺🇸 536 56 3ms 10 Jan 2022 87th Mikey-Beep 🇬🇧 536 56 2ms 20 Aug 2025 91st Sluip 526 57 2ms 12 Jan 2020 91st JRaspass 🇬🇧 526 57 1ms 6 Mar 2020 91st Andrey2001 526 57 7ms 23 days ago 94th Mandrzejy 🇵🇱 517 58 1ms 10 Apr 2024 94th Jacob385 517 58 3ms 15 Apr 2025 94th Pyroan 517 58 2ms 22 hours ago 97th biinari 508 59 2ms 18 Mar 2018 97th vladcioaba 508 59 2ms 8 Nov 2018 97th martinnorling 🇸🇪 508 59 2ms 7 Feb 2022 97th isaiah0311 508 59 2ms 14 Feb 2023 97th inverseLorentz 🇦🇺 508 59 2ms 21 Feb 2024 97th PyryL 🇫🇮 508 59 3ms 23 Aug 2024 97th JunkIce 508 59 3ms 9 Jul 2025 97th HumanoidCPU 508 59 3ms 16 Aug 2025 105th lvenier 500 60 1ms 2 Jan 2018 105th dzove855 500 60 2ms 2 Jan 2018 105th mtrazzi 500 60 2ms 22 Oct 2020 105th DrPiranoid 500 60 2ms 22 Sep 2022 109th eagleduck 492 61 269ms 27 Feb 2018 109th ObserverOfTime 492 61 2ms 18 Nov 2018 109th ytaki0801 🇯🇵 492 61 3ms 19 Jun 2021 109th Robbe7730 492 61 2ms 17 Nov 2021 109th jhpaques 🇫🇷 492 61 2ms 30 Jul 2022 109th zakariamouhid 492 61 2ms 10 Jan 2023 109th jtaxen 492 61 2ms 21 Jun 2023 109th stellartux 492 61 3ms 24 Dec 2023 109th msbranicky 492 61 3ms 3 Jul 2024 109th Just4FunCoder 492 61 2ms 26 Aug 2024 109th desecaw13 492 61 2ms 24 Jan 2025 109th heanyang1 492 61 3ms 22 Apr 2025 109th solisolu 492 61 2ms 18 days ago 122nd madeve-unipi 484 62 2ms 17 Oct 2019 122nd vonKrafft 484 62 2ms 25 Mar 2020 122nd abailey2020 🇺🇸 484 62 2ms 3 Oct 2020 122nd trist224 🇫🇷 484 62 3ms 9 Nov 2022 122nd phpboyscout 484 62 3ms 27 Apr 2023 122nd ashtraypettingzoo 🇺🇸 484 62 2ms 19 Mar 2024 122nd azure-blondon 484 62 3ms 10 Jul 2024 122nd SwordF-Official 484 62 3ms 3 Jun 2025 130th jhunterkohler 476 63 2ms 19 May 2021 131st raphaelimahorn 469 64 2ms 3 Aug 2021 131st fkantelberg 469 64 2ms 15 Jul 2023 133rd nico-bachner 462 65 2ms 5 Dec 2020 133rd CedricGebistorf 462 65 2ms 1 Feb 2022 135th lukasmoellerch 455 66 2ms 5 Oct 2019 135th seanleken 455 66 3ms 20 Dec 2019 135th lilyyy411 455 66 2ms 10 Sep 2021 135th Xzyaihni 455 66 2ms 11 Nov 2022 135th cingulataluke 455 66 3ms 2 Jun 2024 135th hacker112 🇸🇪 455 66 2ms 12 Jun 2024 141st MichaelMBradley 🇨🇦 448 67 2ms 19 Jul 2022 141st Zach1031 448 67 2ms 27 days ago 143rd DaCuteRaccoon 441 68 2ms 2 Apr 2022 144th TheRealOhead 🇺🇸 435 69 2ms 23 Nov 2021 144th CheeseCake628 🇳🇴 435 69 2ms 11 Oct 2023 144th madeforlosers 435 69 3ms 8 Nov 2024 147th natinaum 429 70 2ms 3 May 2019 147th MisterrLuck 429 70 2ms 11 Sep 2023 147th Stockoh 🇫🇷 429 70 3ms 15 Jun 2024 150th aaronze 🇦🇺 423 71 2ms 29 Apr 2021 151st destofr 417 72 2ms 23 Aug 2022 151st Pyro569 417 72 2ms 30 Jul 2023 153rd oceko 411 73 2ms 26 Nov 2022 154th jayanwar 385 78 2ms 20 Dec 2019 154th sh4711 🇩🇪 385 78 2ms 2 May 2021 154th sm1lko 385 78 2ms 14 Dec 2022 157th dillon-duncando 380 79 2ms 21 Dec 2021 158th DrProfPatPending 366 82 2ms 25 Jun 2019 159th j-Ewan 357 84 2ms 19 Jul 2023 160th Import-Meow 349 86 2ms 11 Sep 2022 First Prev 81–160 of 173 Next Last