The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Fibonacci in JavaScript 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 297th Garklein 🇨🇦 825 40 9ms 6 Jan 2022 297th Luca2812 825 40 9ms 14 Jan 2022 297th Heathcorp 🇦🇺 825 40 9ms 31 Mar 2022 297th wwsalmon 825 40 9ms 8 May 2022 297th maxpelic 🇺🇸 825 40 9ms 5 Jul 2022 297th ijchen 825 40 9ms 27 Sep 2022 297th LukeBridges 🇬🇧 825 40 8ms 14 Nov 2022 297th dzshn 825 40 9ms 3 Dec 2022 297th TaserTheFox 🇺🇸 825 40 8ms 12 Dec 2022 297th ItsMeNoobieboy 825 40 9ms 23 Dec 2022 297th zakariamouhid 825 40 9ms 9 Jan 2023 297th davyboyhayes 825 40 8ms 24 Jan 2023 297th AnnoyedArt1256 825 40 9ms 8 Sep 2023 297th two-bad 🇬🇧 825 40 9ms 23 Nov 2023 297th MWI-polygolf 825 40 9ms 6 Dec 2023 297th stellartux 825 40 8ms 26 Dec 2023 297th steffan-polygolf 825 40 8ms 14 Feb 2024 297th Michiocre 825 40 8ms 19 Mar 2024 297th Null000 🇳🇿 825 40 8ms 28 May 2024 297th LostSyntax21 🇬🇧 825 40 9ms 10 Sep 2024 297th Stockoh 🇫🇷 825 40 8ms 4 Nov 2024 297th Ultra814 825 40 9ms 29 Aug 2025 297th alexsave 825 40 8ms 13 Oct 2025 297th Babafaba 825 40 9ms 22 Oct 2025 297th FortuiteMan 🇫🇷 825 40 9ms 20 days ago 297th tomh1012 825 40 8ms 15 days ago 347th oitio 805 41 8ms 31 May 2019 347th shraiwi 805 41 8ms 22 Nov 2019 347th entibo 805 41 8ms 10 Dec 2019 347th alasdair-greenland 805 41 9ms 4 Mar 2020 347th UBKorkut 805 41 8ms 23 Feb 2021 347th Pie42 805 41 9ms 18 Apr 2021 347th aaronze 🇦🇺 805 41 9ms 29 Apr 2021 347th Great-Gamer 805 41 9ms 23 Feb 2022 347th CedricGebistorf 805 41 9ms 4 Mar 2022 347th SkimnerPhi 805 41 9ms 11 Mar 2022 347th gurglemurgle5 805 41 8ms 18 Apr 2022 347th aydynx 805 41 8ms 25 Jan 2023 347th guywithnose 805 41 9ms 12 May 2023 347th efgen 805 41 8ms 26 Dec 2023 347th weliveinhell 🇭🇹 805 41 8ms 28 Dec 2023 347th roupiq 🇵🇱 805 41 8ms 15 Feb 2024 347th PyryL 🇫🇮 805 41 9ms 23 Aug 2024 347th NickTheEASDude 🇺🇸 805 41 9ms 29 Aug 2024 347th SwordF-Official 805 41 9ms 2 Jun 2025 347th TRexOnGit 805 41 8ms 29 Jul 2025 347th Evankhell0 805 41 9ms 8 Aug 2025 347th albanian-laundromat 805 41 9ms 14 Sep 2025 369th ohailstorm 786 42 8ms 9 Mar 2018 369th rumblesan 786 42 8ms 8 Dec 2018 369th phpshko 786 42 8ms 6 Apr 2019 369th AaronGarbut 786 42 9ms 30 Jul 2019 369th vgroen 786 42 8ms 3 Jan 2020 369th NatNgs 786 42 8ms 7 Jan 2020 369th Michal-Miky-Jankovsky 786 42 9ms 4 May 2020 369th modellking 786 42 8ms 3 Jun 2020 369th juanmoncada 786 42 9ms 10 Aug 2020 369th hyvyys 786 42 8ms 11 Sep 2020 369th tpiechaczek 🇵🇱 786 42 9ms 22 Dec 2020 369th xkacer 🇨🇿 786 42 9ms 24 Jan 2021 369th heypwesto 🇳🇿 786 42 9ms 16 Apr 2021 369th evalPenny 🇰🇷 786 42 8ms 6 Jul 2021 369th SpareManiKatti 786 42 8ms 15 Jul 2021 369th Giga-Bowser 786 42 8ms 20 Dec 2021 369th fourth-bit 786 42 8ms 14 Jan 2022 369th ledietz 786 42 9ms 11 Feb 2022 369th Anonymousellama21 786 42 9ms 11 Feb 2022 369th moikaturns 🇬🇧 786 42 9ms 18 Oct 2022 369th Tavress 786 42 8ms 11 May 2023 369th charliegaming 786 42 9ms 3 Oct 2023 369th dommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmy 786 42 9ms 15 May 2024 369th desecaw13 786 42 9ms 24 Jan 2025 369th ffelixm 786 42 8ms 11 Jun 2025 369th acollett89 786 42 9ms 15 Jul 2025 369th tknight-dev 786 42 8ms 25 Jul 2025 369th 52525rr 786 42 9ms 20 Oct 2025 397th GiftOfDeath 767 43 9ms 5 Feb 2018 397th ian-odonnell 767 43 9ms 12 Mar 2018 397th dangilkerson 767 43 9ms 28 Sep 2018 397th paudr 767 43 8ms 4 May 2019 First Prev 321–400 of 857 Next Last