The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Fibonacci in Go 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 1st FlorianCassayre 🇫🇷 1,000 79 278ms 16 Jul 2025 1st jessesomerville 1,000 79 259ms 20 Jul 2025 1st GolfingSuccess 🇬🇷 1,000 79 279ms 22 Aug 2025 1st KasperKivimaeki 🇫🇮 1,000 79 245ms 25 Sep 2025 1st albanian-laundromat 1,000 79 263ms 2 Oct 2025 1st cefqrn 1,000 79 261ms 9 Nov 2025 1st solisolu 1,000 79 270ms 19 Nov 2025 1st Andrey2001 1,000 79 258ms 23 days ago 1st CornerMercury 🇬🇧 1,000 79 300ms 11 days ago 90th hjcafaroUC 988 80 260ms 7 Aug 2020 90th BBoehm 🇩🇪 988 80 255ms 27 Dec 2020 90th janbehrens 🇩🇪 988 80 260ms 13 Jun 2021 90th RutZap 988 80 271ms 24 Jan 2023 90th scpchicken 🇵🇼 988 80 264ms 4 Feb 2023 90th Re-Adventures 🇮🇳 988 80 259ms 15 Jun 2023 90th dokutan 988 80 261ms 24 Jul 2024 97th megaturbo 975 81 250ms 11 Jun 2020 97th roflolilolmao 975 81 262ms 11 Jun 2020 97th argusdusty 🇺🇸 975 81 281ms 27 Dec 2020 97th plcc0 975 81 256ms 28 Mar 2025 97th CheeseCake628 🇳🇴 975 81 255ms 2 Oct 2025 102nd vonKrafft 963 82 261ms 15 Apr 2020 102nd madxmike 963 82 262ms 19 Apr 2020 102nd superloach 963 82 266ms 19 Apr 2020 102nd Ripick 963 82 262ms 30 Apr 2023 102nd mathisfun271 963 82 268ms 21 Feb 2024 102nd hrubymar10 963 82 257ms 21 Feb 2024 102nd ashscodes 963 82 262ms 29 Apr 2024 102nd allensuvorov 963 82 263ms 6 Jun 2024 102nd nstearns96 🇬🇧 963 82 269ms 13 Sep 2024 102nd desecaw13 963 82 261ms 24 Jan 2025 102nd heanyang1 963 82 262ms 27 Mar 2025 102nd Pyroan 963 82 292ms 23 hours ago 114th detrumi 🇳🇱 952 83 263ms 13 Feb 2021 114th shellbertt 🇨🇦 952 83 267ms 17 Nov 2021 114th KingSkyrock 🇺🇸 952 83 258ms 4 Apr 2022 114th Yax42 🇫🇷 952 83 256ms 4 Oct 2025 114th BREMAUCY 🇫🇷 952 83 310ms 34 hours ago 119th marcin7Cd 940 84 259ms 10 Jan 2021 119th CedricGebistorf 940 84 258ms 13 Mar 2022 119th TheRealOhead 🇺🇸 940 84 260ms 21 Mar 2022 119th trist224 🇫🇷 940 84 258ms 15 Nov 2022 119th astdefu 940 84 254ms 11 Dec 2022 119th madeforlosers 940 84 269ms 21 Nov 2024 119th ereztaiar 🇮🇱 940 84 262ms 19 May 2025 126th ricxi 929 85 266ms 18 Apr 2020 126th vadimzhukck 929 85 261ms 26 Apr 2020 126th PhysicDev 🇫🇷 929 85 257ms 9 Jun 2021 126th raphaelimahorn 929 85 259ms 3 Aug 2021 126th georgehorrell 929 85 259ms 5 Aug 2021 126th MichaelMBradley 🇨🇦 929 85 259ms 19 Jul 2022 126th epic-programmer-guy 929 85 260ms 26 Dec 2023 133rd ncitron 919 86 257ms 16 Apr 2020 133rd jacob-faber 919 86 276ms 16 Apr 2020 133rd danieldooley 919 86 256ms 20 Apr 2020 133rd kevpie 919 86 265ms 20 Apr 2020 133rd Alex-x90 🇺🇸 919 86 261ms 24 Sep 2022 133rd MCausc78 🇺🇦 919 86 265ms 29 Dec 2022 133rd jackkav 919 86 258ms 2 Apr 2023 133rd msbranicky 919 86 252ms 25 Aug 2023 141st MichalMarsalek 🇨🇿 908 87 254ms 29 Nov 2021 141st nyoshe 908 87 250ms 10 Oct 2023 143rd doge1338 898 88 258ms 20 Mar 2021 143rd j-Ewan 898 88 260ms 10 Mar 2022 143rd eraofballoon 898 88 257ms 16 Mar 2023 143rd Just4FunCoder 898 88 261ms 26 Aug 2024 143rd Lv0Sys 🇵🇱 898 88 253ms 25 May 2025 143rd tknight-dev 898 88 255ms 27 Jul 2025 149th Jacob385 888 89 270ms 31 Jul 2024 150th ashtraypettingzoo 🇺🇸 878 90 265ms 16 Feb 2023 150th StupidHobbit 878 90 265ms 22 days ago 152nd martinnorling 🇸🇪 868 91 253ms 15 Feb 2022 152nd Maximizer02 868 91 282ms 7 Feb 2025 152nd Upload-and-View 🇺🇦 868 91 281ms 21 Aug 2025 152nd jacekwladzinski 868 91 249ms 2 Oct 2025 156th oceko 859 92 260ms 26 Nov 2022 156th charliegaming 859 92 255ms 3 Oct 2023 158th HassanAliKadhem 🇧🇭 849 93 267ms 3 Aug 2023 158th KrausRaus 🇺🇸 849 93 264ms 12 Jan 2025 160th sech1p 🇵🇱 840 94 256ms 26 Jun 2021 First Prev 81–160 of 216 Next Last