The Calendar hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Gray Code Encoder in all languages 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 160th sean-niemann 🇺🇸 0 75 102ms 8 May 2025 162nd GolfingSuccess 🇬🇷 0 76 130ms 28 Nov 2025 163rd rucin93 🇵🇱 0 77 122ms 8 May 2025 163rd Shanethegamer 🇺🇸 0 77 149ms 12 Nov 2025 165th saito-ta 🇯🇵 0 78 4ms 10 May 2025 165th rhdqor213 0 78 4ms 10 May 2025 167th sean-niemann 🇺🇸 0 80 462ms 8 May 2025 168th kumavale 0 81 155ms 26 Nov 2025 169th GolfingSuccess 🇬🇷 0 82 471ms 8 May 2025 170th Shanethegamer 🇺🇸 0 83 463ms 26 Nov 2024 170th emgordon154 0 83 169ms 9 May 2025 170th edsrzf 🇳🇿 0 83 379ms 9 Jul 2025 170th Shanethegamer 🇺🇸 0 83 381ms 9 Jul 2025 174th Shanethegamer 🇺🇸 0 84 380ms 26 Nov 2024 174th ovs-code 🇩🇪 0 84 12ms 10 May 2025 176th GolfingSuccess 🇬🇷 0 85 44ms 8 May 2025 176th edsrzf 🇳🇿 0 85 45ms 8 May 2025 176th edsrzf 🇳🇿 0 85 17ms 9 May 2025 176th error256 0 85 18ms 10 May 2025 180th Shanethegamer 🇺🇸 0 86 154ms 17 Dec 2024 180th kg583 🇺🇸 0 86 39ms 16 Feb 2025 180th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 180th GolfingSuccess 🇬🇷 0 86 2,139ms 8 May 2025 180th edsrzf 🇳🇿 0 86 148ms 9 May 2025 180th sean-niemann 🇺🇸 0 86 452ms 25 Sep 2025 180th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 180th MeWhenI 🇻🇦 0 86 441ms 21 Nov 2025 188th Shanethegamer 🇺🇸 0 87 45ms 15 Apr 2025 188th GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 188th Shanethegamer 🇺🇸 0 87 19ms 8 May 2025 191st GolfingSuccess 🇬🇷 0 88 6ms 12 Nov 2025 192nd GolfingSuccess 🇬🇷 0 89 12ms 30 Dec 2024 192nd Shanethegamer 🇺🇸 0 89 344ms 6 May 2025 192nd Shanethegamer 🇺🇸 0 89 459ms 24 Sep 2025 192nd DialFrost 🇸🇬 0 89 433ms 21 Nov 2025 196th KasperKivimaeki 🇫🇮 0 91 13ms 8 May 2025 196th GolfingSuccess 🇬🇷 0 91 14ms 16 days ago 198th namelessiw 0 92 457ms 10 Oct 2025 199th edsrzf 🇳🇿 0 93 170ms 17 May 2025 200th DialFrost 🇸🇬 0 94 13ms 10 May 2025 201st GolfingSuccess 🇬🇷 0 96 168ms 7 May 2025 202nd Shanethegamer 🇺🇸 0 98 8ms 6 May 2025 203rd snydej 0 99 41ms 22 Nov 2024 204th sean-niemann 🇺🇸 0 102 270ms 8 May 2025 204th Shanethegamer 🇺🇸 0 102 267ms 8 May 2025 204th edsrzf 🇳🇿 0 102 270ms 9 May 2025 204th GolfingSuccess 🇬🇷 0 102 268ms 9 May 2025 204th ovs-code 🇩🇪 0 102 311ms 16 days ago 209th lukechampine 0 103 264ms 7 Jun 2025 209th chris124567 0 103 274ms 8 Jun 2025 209th albanian-laundromat 0 103 346ms 12 days ago 212th GolfingSuccess 🇬🇷 0 114 396ms 8 May 2025 212th edsrzf 🇳🇿 0 114 16ms 10 May 2025 214th GolfingSuccess 🇬🇷 0 117 34ms 4 days ago 215th GolfingSuccess 🇬🇷 0 125 302ms 16 days ago 216th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 217th Natanaelel 🇸🇪 0 130 335ms 2 May 2025 218th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 219th GolfingSuccess 🇬🇷 0 138 309ms 8 May 2025 219th albanian-laundromat 0 138 26ms 23 Nov 2025 221st emgordon154 0 150 15ms 9 May 2025 222nd RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 223rd Shanethegamer 🇺🇸 0 197 492ms 1 Feb 2025 224th GolfingSuccess 🇬🇷 0 219 407ms 16 days ago 225th JOrE20 🇺🇸 0 381 2,034ms 4 hours ago First Prev 161–225 of 225
