The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Fibonacci in JavaScript 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 801st marissa999 418 79 9ms 9 Jan 2018 801st StronkCheese 🇺🇸 418 79 8ms 13 Mar 2023 803rd Starwort 🇬🇧 413 80 8ms 15 Dec 2018 803rd marea 413 80 8ms 18 Jun 2020 805th dcure73 407 81 9ms 7 Jun 2019 805th tickct 407 81 24ms 13 Sep 2019 805th shawphy 407 81 9ms 15 Oct 2021 805th PowershellKnut 🇳🇴 407 81 8ms 7 Jan 2024 809th jakethakur 402 82 9ms 30 Mar 2018 809th steedwards241 402 82 8ms 12 Nov 2020 809th brodie-m 402 82 8ms 24 Nov 2022 809th rushi0326 402 82 9ms 26 Dec 2023 813th pashabou 398 83 8ms 5 Apr 2018 813th WilleyOhana 398 83 24ms 26 Feb 2021 813th rossmacfarlane 398 83 8ms 9 Nov 2022 816th MarlonClark 393 84 9ms 30 Dec 2019 816th ThePyProgrammer 393 84 8ms 14 Dec 2021 816th ahorihan 393 84 9ms 3 Aug 2022 819th syedad218 384 86 9ms 12 Jul 2023 820th MatthewDietrich 379 87 26ms 6 Jun 2018 821st dkdub 371 89 9ms 2 Jun 2018 821st dbkirk4211 371 89 8ms 3 May 2024 823rd aloehan 367 90 8ms 18 Dec 2017 823rd Designer023 367 90 9ms 7 Feb 2020 823rd feherd 367 90 8ms 15 Nov 2023 826th hacker19374 363 91 8ms 8 Mar 2023 826th JackieAlacrity2373 363 91 9ms 14 May 2024 828th nickforddev 359 92 8ms 28 Nov 2023 829th Alice-Cheshire 355 93 9ms 26 Feb 2018 830th pablaber 347 95 24ms 28 Sep 2017 831st kevinnaviapaiva 337 98 8ms 17 Feb 2025 832nd polyrtm 330 100 9ms 17 Nov 2018 832nd jtaxen 330 100 8ms 18 Mar 2022 834th itsabdelrahman 324 102 8ms 22 May 2018 835th Noah-Fox 311 106 8ms 1 Jun 2022 836th mathu99 287 115 8ms 11 Oct 2017 837th ryanarobbins 284 116 24ms 4 Jun 2020 838th Raka-Raka 282 117 9ms 18 Jan 2020 839th zbaklund 277 119 9ms 12 Apr 2018 839th danielproctor31 277 119 8ms 28 Mar 2019 839th patrick96 277 119 8ms 4 Jan 2020 842nd jcwebhole 275 120 9ms 28 Jun 2018 843rd shuabrannigan 260 127 9ms 3 Apr 2023 844th AlexGoldthorpe 250 132 8ms 23 Oct 2020 845th nephila-nacrea 🇬🇧 236 140 8ms 17 Aug 2020 846th KatieLG-Transpiler 🇬🇧 232 142 9ms 23 Jun 2022 847th alvincentinio 209 158 9ms 9 Jul 2019 848th NathanGabrielson 205 161 8ms 30 Mar 2022 849th mothcolada 🇺🇸 192 172 9ms 13 Apr 2021 849th mokymok 🇺🇸 192 172 9ms 9 Nov 2021 851st kmegoryc 177 186 9ms 29 Oct 2019 852nd Yen-Peng 173 191 8ms 14 Jul 2020 853rd PaulCouthouis 167 198 9ms 30 Nov 2022 854th BKGSr2 164 201 8ms 17 Mar 2023 855th bensrobe 136 243 8ms 25 Feb 2019 856th seanleken 123 269 27ms 7 Oct 2019 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