The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
Tutorial 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 621st edsrzf 🇳🇿 0 58 5ms 9 Feb 2025 621st targrik 0 58 4ms 15 Feb 2025 621st edsrzf 🇳🇿 0 58 3ms 19 Feb 2025 621st orthoplex 🇨🇽 0 58 3ms 16 Apr 2025 621st edsrzf 🇳🇿 0 58 6ms 17 Apr 2025 621st DialFrost 🇸🇬 0 58 6ms 17 Apr 2025 621st DialFrost 🇸🇬 0 58 4ms 17 Apr 2025 621st Shanethegamer 🇺🇸 0 58 5ms 17 Apr 2025 621st DialFrost 🇸🇬 0 58 8ms 17 Apr 2025 621st GolfingSuccess 🇬🇷 0 58 5ms 17 Apr 2025 621st HumanoidCPU 0 58 6ms 18 Apr 2025 621st HumanoidCPU 0 58 7ms 18 Apr 2025 621st CaedenHarper 🇨🇦 0 58 6ms 18 Apr 2025 621st CaedenHarper 🇨🇦 0 58 5ms 18 Apr 2025 621st dokutan 0 58 3ms 28 Apr 2025 621st 2bular 0 58 3ms 8 Jul 2025 621st h3ra993huskp 🇯🇵 0 58 4,777ms 11 Aug 2025 621st frankgraziano 0 58 6ms 13 Aug 2025 621st snoozingnewt 🇨🇦 0 58 6ms 15 Sep 2025 621st snoozingnewt 🇨🇦 0 58 6ms 15 Sep 2025 621st snoozingnewt 🇨🇦 0 58 3ms 15 Sep 2025 621st kg583 🇺🇸 0 58 5ms 27 Sep 2025 621st plcc0 0 58 6ms 7 Oct 2025 621st TheZwierzLF 🇵🇱 0 58 508ms 21 Nov 2025 621st JOrE20 🇺🇸 0 58 6ms 25 Nov 2025 666th MeWhenI 🇻🇦 0 59 6ms 11 Dec 2024 666th emgordon154 0 59 6ms 8 Jan 2025 666th duckyluuk 🇳🇱 0 59 5ms 12 Jan 2025 666th Natanaelel 🇸🇪 0 59 5ms 2 Feb 2025 666th ovs-code 🇩🇪 0 59 16ms 4 Feb 2025 666th Shanethegamer 🇺🇸 0 59 5ms 7 Feb 2025 666th voytxt 🇨🇿 0 59 8ms 8 Feb 2025 666th GolfingSuccess 🇬🇷 0 59 16ms 15 Feb 2025 666th 2bular 0 59 16ms 5 Mar 2025 666th DialFrost 🇸🇬 0 59 24ms 17 Apr 2025 666th zacjl 0 59 17ms 17 Apr 2025 666th Shanethegamer 🇺🇸 0 59 15ms 17 Apr 2025 666th HumanoidCPU 0 59 16ms 18 Apr 2025 666th dokutan 0 59 16ms 28 Apr 2025 666th edsrzf 🇳🇿 0 59 16ms 13 Jun 2025 666th LostSyntax21 🇬🇧 0 59 7ms 19 Jul 2025 666th snoozingnewt 🇨🇦 0 59 15ms 15 Sep 2025 666th gaving-quadprep 0 59 56ms 26 Oct 2025 666th FlyingPenguin223 0 59 2ms 14 Nov 2025 666th MeWhenI 🇻🇦 0 59 2ms 14 Nov 2025 686th xsot 🇸🇬 0 60 5ms 4 Dec 2024 686th CatsAreFluffy 0 60 67ms 13 Dec 2024 686th emgordon154 0 60 4,893ms 4 Feb 2025 686th klixel 🇨🇦 0 60 94ms 8 Apr 2025 686th emgordon154 0 60 2ms 5 Aug 2025 686th emgordon154 0 60 89ms 5 Nov 2025 686th Babafaba 0 60 725ms 24 Nov 2025 693rd Shanethegamer 🇺🇸 0 61 12ms 20 Nov 2024 693rd stefangimmillaro 0 61 11ms 21 Nov 2024 693rd error256 0 61 11ms 21 Nov 2024 693rd error256 0 61 119ms 21 Nov 2024 693rd ovs-code 🇩🇪 0 61 11ms 25 Nov 2024 693rd GolfingSuccess 🇬🇷 0 61 11ms 25 Nov 2024 693rd sean-niemann 🇺🇸 0 61 12ms 26 Nov 2024 693rd duckyluuk 🇳🇱 0 61 11ms 26 Nov 2024 693rd DialFrost 🇸🇬 0 61 12ms 26 Nov 2024 693rd rucin93 🇵🇱 0 61 12ms 26 Nov 2024 693rd emgordon154 0 61 11ms 28 Nov 2024 693rd stefangimmillaro 0 61 5ms 3 Dec 2024 693rd lukegustafson 🇺🇸 0 61 13ms 7 Dec 2024 693rd MeWhenI 🇻🇦 0 61 12ms 11 Dec 2024 693rd emplv 🇱🇻 0 61 12ms 11 Dec 2024 693rd voytxt 🇨🇿 0 61 11ms 22 Dec 2024 693rd Salutations45 0 61 11ms 29 Dec 2024 693rd duckyluuk 🇳🇱 0 61 1,660ms 12 Jan 2025 693rd CLOStrophobic 🇮🇹 0 61 12ms 22 Jan 2025 693rd voytxt 🇨🇿 0 61 5ms 25 Jan 2025 693rd m-tkach 🇺🇦 0 61 11ms 30 Jan 2025 693rd Natanaelel 🇸🇪 0 61 12ms 2 Feb 2025 693rd CaedenHarper 🇨🇦 0 61 12ms 3 Feb 2025 693rd BalaM314 0 61 12ms 4 Feb 2025 693rd kg583 🇺🇸 0 61 103ms 5 Feb 2025 693rd GolfingSuccess 🇬🇷 0 61 107ms 5 Feb 2025 693rd HumanoidCPU 0 61 4ms 7 Feb 2025 693rd targrik 0 61 11ms 8 Feb 2025 First Prev 641–720 of 3,014 Next Last