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 814th DialFrost 🇸🇬 0 65 6ms 17 Apr 2025 814th DialFrost 🇸🇬 0 65 10ms 17 Apr 2025 814th error256 0 65 12ms 17 Apr 2025 814th rucin93 🇵🇱 0 65 11ms 17 Apr 2025 814th edsrzf 🇳🇿 0 65 126ms 17 Apr 2025 814th edsrzf 🇳🇿 0 65 4ms 18 Apr 2025 814th HumanoidCPU 0 65 13ms 18 Apr 2025 814th HumanoidCPU 0 65 11ms 18 Apr 2025 814th HumanoidCPU 0 65 130ms 18 Apr 2025 814th DialFrost 🇸🇬 0 65 131ms 18 Apr 2025 814th BlankSpruce 0 65 11ms 18 Apr 2025 814th Shanethegamer 🇺🇸 0 65 137ms 18 Apr 2025 814th CaedenHarper 🇨🇦 0 65 9ms 18 Apr 2025 814th CaedenHarper 🇨🇦 0 65 130ms 18 Apr 2025 814th FEZfan 🇦🇺 0 65 11ms 19 Apr 2025 814th undefinedRyan 0 65 10ms 19 Apr 2025 814th DialFrost 🇸🇬 0 65 4ms 20 Apr 2025 814th plcc0 0 65 10ms 21 Apr 2025 814th dokutan 0 65 7ms 28 Apr 2025 814th RYSF13 🇨🇳 0 65 2ms 13 May 2025 814th Shanethegamer 🇺🇸 0 65 3ms 13 May 2025 814th robin-scragg 0 65 10ms 19 May 2025 814th ryyyn 🇺🇸 0 65 13ms 21 May 2025 814th Moltres-Galar 🇺🇦 0 65 12ms 21 May 2025 814th albanian-laundromat 0 65 13ms 4 Jun 2025 814th fuzzylojik-golf 🇺🇸 0 65 11ms 5 Jun 2025 814th codingisgreatbutiamnot 0 65 12ms 7 Jun 2025 814th SoliGhost 0 65 13ms 8 Jun 2025 814th cros107 🇦🇺 0 65 10ms 14 Jun 2025 814th long279595192 0 65 12ms 20 Jun 2025 814th jiji7879 0 65 10ms 20 Jun 2025 814th alemelis 0 65 10ms 20 Jun 2025 814th elana-teal 0 65 12ms 20 Jun 2025 814th zijinoier 0 65 12ms 25 Jun 2025 814th dirckvdende 0 65 10ms 30 Jun 2025 814th BREMAUCY 🇫🇷 0 65 10ms 1 Jul 2025 814th Quentin-AC 0 65 13ms 2 Jul 2025 814th qpwoeirut 0 65 12ms 3 Jul 2025 814th Jak-Ch-ll 0 65 12ms 6 Jul 2025 814th anter69 🇭🇺 0 65 10ms 9 Jul 2025 814th Flekay 🇩🇪 0 65 11ms 10 Jul 2025 814th klixel 🇨🇦 0 65 10ms 11 Jul 2025 814th KasperKivimaeki 🇫🇮 0 65 13ms 15 Jul 2025 814th Nyandereian 0 65 13ms 15 Jul 2025 814th itu-itis21-akkoyuno21 0 65 14ms 15 Jul 2025 814th GrayJoKing 🇦🇺 0 65 13ms 18 Jul 2025 814th AbrahamJLR 🇻🇪 0 65 14ms 18 Jul 2025 814th RaBa21 🇭🇺 0 65 16ms 19 Jul 2025 814th jeetsh4h 0 65 13ms 19 Jul 2025 814th LostSyntax21 🇬🇧 0 65 12ms 19 Jul 2025 814th wuduculfre 0 65 10ms 21 Jul 2025 814th yjgnaw 0 65 10ms 24 Jul 2025 814th oween12 0 65 10ms 6 Aug 2025 814th xiaoyiming123 0 65 10ms 11 Aug 2025 814th EthanJantz 0 65 11ms 12 Aug 2025 814th wobblybits 0 65 12ms 14 Aug 2025 814th janlelis 0 65 10ms 14 Aug 2025 814th ShaanveerS 0 65 10ms 17 Aug 2025 814th ut0s 0 65 12ms 23 Aug 2025 814th HETHAT 🇩🇿 0 65 10ms 3 Sep 2025 814th republic82 0 65 10ms 13 Sep 2025 814th snoozingnewt 🇨🇦 0 65 7ms 15 Sep 2025 814th snoozingnewt 🇨🇦 0 65 128ms 15 Sep 2025 814th snoozingnewt 🇨🇦 0 65 10ms 15 Sep 2025 814th snoozingnewt 🇨🇦 0 65 3ms 15 Sep 2025 814th hellopir2 0 65 10ms 18 Sep 2025 814th edsrzf 🇳🇿 0 65 3ms 18 Sep 2025 814th GolfingSuccess 🇬🇷 0 65 3ms 19 Sep 2025 814th DialFrost 🇸🇬 0 65 3ms 19 Sep 2025 814th now4est 🇯🇵 0 65 13ms 21 Sep 2025 814th ahmetdemirag 🇨🇾 0 65 10ms 24 Sep 2025 814th J09M 0 65 12ms 25 Sep 2025 814th ShikChen 🇹🇼 0 65 10ms 26 Sep 2025 814th Shanethegamer 🇺🇸 0 65 3ms 28 Sep 2025 814th davecame 0 65 14ms 3 Oct 2025 814th CommandLeo 🇮🇹 0 65 11ms 4 Oct 2025 814th ThePixelatedCat 0 65 14ms 6 Oct 2025 814th snoozingnewt 🇨🇦 0 65 3ms 6 Oct 2025 814th luuumine 🇫🇷 0 65 12ms 8 Oct 2025 814th fvla 0 65 11ms 14 Oct 2025 First Prev 881–960 of 3,014 Next Last