The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Fibonacci in all languages 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 447th stefangimmillaro 964 51 352ms 24 Sep 2024 447th b-illy 🇬🇧 964 51 333ms 17 Jan 2025 447th Yax42 🇫🇷 964 51 363ms 6 Feb 2025 447th fuzzylojik-golf 🇺🇸 964 51 388ms 2 Jun 2025 447th AdrienHache 🇫🇷 964 51 362ms 7 Sep 2025 447th Decrare 964 51 370ms 11 Sep 2025 447th snoozingnewt 🇨🇦 964 51 375ms 4 Oct 2025 488th pardouin 🇫🇷 964 57 444ms 24 Sep 2025 488th DialFrost 🇸🇬 964 57 458ms 24 Sep 2025 488th JayXon 🇺🇸 964 57 479ms 24 Sep 2025 488th fuzzylojik-golf 🇺🇸 964 57 494ms 24 Sep 2025 488th snoozingnewt 🇨🇦 964 57 450ms 24 Sep 2025 488th b-illy 🇬🇧 964 57 444ms 24 Sep 2025 488th sean-niemann 🇺🇸 964 57 447ms 24 Sep 2025 488th GolfingSuccess 🇬🇷 964 57 444ms 25 Sep 2025 488th btnlq 964 57 451ms 25 Sep 2025 488th nwellnhof 🇩🇪 964 57 440ms 25 Sep 2025 488th namelessiw 964 57 425ms 2 Oct 2025 488th ovs-code 🇩🇪 964 57 440ms 3 Oct 2025 488th Yax42 🇫🇷 964 57 445ms 4 Oct 2025 488th stefangimmillaro 964 57 458ms 6 Oct 2025 488th Apataras 964 57 459ms 7 Oct 2025 488th Jacob385 964 57 640ms 27 Oct 2025 488th MeWhenI 🇻🇦 964 57 431ms 7 Nov 2025 488th cefqrn 964 57 373ms 17 Nov 2025 488th sisyphus-ppcg 🇦🇺 964 57 399ms 22 days ago 488th h3ra993huskp 🇯🇵 964 57 417ms 18 days ago 488th KasperKivimaeki 🇫🇮 964 57 388ms 16 days ago 488th Lydxn 🇨🇦 964 57 313ms 6 days ago 510th HPWiz 🇳🇿 962 28 240ms 30 Jan 2021 510th JayXon 🇺🇸 962 28 276ms 20 Jun 2021 510th Lydxn 🇨🇦 962 28 193ms 20 Jun 2021 510th btnlq 962 28 217ms 4 Feb 2022 510th antimon2 🇯🇵 962 28 252ms 28 Oct 2022 510th sisyphus-ppcg 🇦🇺 962 28 270ms 7 Mar 2023 510th Steffan153 🇫🇮 962 28 292ms 8 Mar 2023 510th tidalDisruptionEvent 🇨🇦 962 28 271ms 14 Mar 2023 510th lynn 962 28 249ms 14 Mar 2023 510th ovs-code 🇩🇪 962 28 287ms 15 Mar 2023 510th alemelis 962 28 246ms 20 Mar 2023 510th DialFrost 🇸🇬 962 28 267ms 2 Jan 2024 510th twolfive 962 28 197ms 5 Oct 2024 510th sean-niemann 🇺🇸 962 28 261ms 24 Jan 2025 524th icy-lava 961 43 1ms 5 Feb 2018 524th Erutuon 961 43 1ms 21 Feb 2018 524th Florob 961 43 1ms 1 Apr 2018 524th kartik-s 961 43 1ms 13 Apr 2018 524th cafehaine 🇫🇷 961 43 1ms 30 Jul 2018 524th esparano 961 43 1ms 25 Apr 2019 524th primo-ppcg 🇹🇭 961 43 1ms 15 Feb 2020 524th Shanethegamer 🇺🇸 961 43 1ms 23 Feb 2020 524th GalladeGuy 🇺🇸 961 43 1ms 23 Feb 2020 524th prplz 🇦🇺 961 43 1ms 24 Feb 2020 524th DaCoolOne 961 43 1ms 25 Feb 2020 524th Attero 🇸🇪 961 43 1ms 5 Mar 2020 524th bastienvoirin 🇫🇷 961 43 1ms 5 Apr 2020 524th Darkrizen7 961 43 2ms 8 Apr 2020 524th dmoa 961 43 1ms 10 Jul 2020 524th janbehrens 🇩🇪 961 43 1ms 20 Aug 2020 524th Waffle3z 961 43 1ms 25 Sep 2020 524th marcin7Cd 961 43 1ms 8 Oct 2020 524th GoateSo 961 43 1ms 18 Oct 2020 524th BBoehm 🇩🇪 961 43 1ms 4 Jan 2021 524th GrayJoKing 🇦🇺 961 43 1ms 12 Jan 2021 524th Lydxn 🇨🇦 961 43 1ms 13 Jan 2021 524th Irratix 🇳🇱 961 43 1ms 14 Jan 2021 524th sisyphus-ppcg 🇦🇺 961 43 1ms 20 Jan 2021 524th JayXon 🇺🇸 961 43 1ms 19 Feb 2021 524th oljoi 961 43 1ms 2 Apr 2021 524th s-g-stavely 961 43 1ms 3 May 2021 524th MatheusAvellar 🇧🇷 961 43 1ms 6 May 2021 524th Natanaelel 🇸🇪 961 43 1ms 18 May 2021 524th call23re 961 43 1ms 4 Sep 2021 524th StarmaQ 961 43 1ms 10 Sep 2021 524th btnlq 961 43 1ms 27 Sep 2021 524th MeWhenI 🇻🇦 961 43 1ms 11 Oct 2021 524th RockOfStone 961 43 1ms 8 Nov 2021 524th funkkiy 🇧🇷 961 43 1ms 20 Nov 2021 524th TetraPengwin 961 43 1ms 14 Dec 2021 524th 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