The Calendar hole will go live in approximately 8 hours. Why not try and solve it ahead of time?
Zeckendorf Representation 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 641st Zhenyu-Bo 387 276 10ms 1 Aug 2025 642nd Msleizak 🇫🇷 386 176 241ms 19 Jul 2024 643rd BambooleanLogic 🇸🇪 382 181 9ms 23 Jun 2025 644th madex 🇩🇪 381 349 230ms 1 Jul 2024 645th ComputerKWasTaken 🇺🇸 377 360 259ms 1 Jul 2024 646th jerrandolph 364 373 273ms 21 Sep 2025 647th dokutan 363 194 350ms 2 Jul 2024 648th saito-ta 🇯🇵 358 482 665ms 10 Jul 2024 649th dokutan 346 330 40ms 27 Aug 2024 650th Schmitt-Very-Cool 324 345 507ms 3 Oct 2025 651st JRaspass 🇬🇧 320 198 3ms 1 Jul 2024 652nd MyXoToD 🇩🇪 311 222 10ms 26 May 2025 653rd KatieLG 🇬🇧 310 438 299ms 22 Sep 2024 654th aksyristos 304 352 10ms 27 Sep 2024 655th Sascha37 🇩🇪 261 331 2ms 26 Sep 2025 656th madex 🇩🇪 247 273 35ms 1 Jul 2024 657th KatieLG 🇬🇧 218 467 385ms 13 Oct 2024 658th KatieLG 🇬🇧 187 624 3ms 15 Sep 2024 659th scpchicken 🇵🇼 158 402 3ms 4 Jul 2024 660th KatieLG 🇬🇧 151 718 10ms 15 Sep 2024 661st AidanWalter 149 716 10ms 3 Jan 2025 662nd KatieLG 🇬🇧 149 778 121ms 15 Sep 2024 663rd KatieLG 🇬🇧 146 913 212ms 15 Sep 2024 664th KatieLG 🇬🇧 142 445 4ms 15 Sep 2024 665th KatieLG 🇬🇧 128 673 112ms 15 Sep 2024 666th KatieLG 🇬🇧 127 926 32ms 15 Sep 2024 667th KatieLG 🇬🇧 126 559 208ms 15 Sep 2024 668th KatieLG 🇬🇧 115 490 2ms 15 Sep 2024 669th KatieLG 🇬🇧 115 861 2ms 15 Sep 2024 670th dokutan 113 963 79ms 4 Aug 2025 671st KatieLG 🇬🇧 104 825 106ms 15 Sep 2024 672nd KatieLG 🇬🇧 91 1,193 1,153ms 15 Sep 2024 673rd dokutan 90 963 2ms 4 Aug 2025 674th CaedenHarper 🇨🇦 83 724 144ms 11 Nov 2025 675th MeWhenI 🇻🇦 13 9,255 4ms 1 Jul 2024 676th 2bular 0 23 74ms 18 Apr 2025 677th Natanaelel 🇸🇪 0 24 96ms 19 Apr 2025 678th namelessiw 0 29 149ms 25 Oct 2025 679th kg583 🇺🇸 0 30 1,292ms 8 Feb 2025 680th AlephSquirrel 0 68 9ms 7 days ago 681st Shanethegamer 🇺🇸 0 71 22ms 19 May 2025 682nd ovs-code 🇩🇪 0 96 14ms 13 Jun 2025 683rd Shanethegamer 🇺🇸 0 104 62ms 4 Jul 2025 684th bitsandbeyond 🇳🇱 0 134 1,308ms 22 Nov 2025 685th KatieLG 🇬🇧 0 136 9ms 19 May 2025 686th edsrzf 🇳🇿 0 141 166ms 27 Apr 2025 687th albanian-laundromat 0 172 3ms 7 Jun 2025 688th dokutan 0 234 63ms 28 Jun 2025 First Prev 641–688 of 688
