The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Forsyth–Edwards Notation 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 321st quirked-up 792 141 9ms 31 Aug 2023 321st KrausRaus 🇺🇸 792 141 9ms 3 Nov 2023 323rd MeWhenI 🇻🇦 792 177 2ms 1 May 2023 324th Steffan153 🇫🇮 791 154 3ms 23 Jun 2023 325th RockOfStone 790 162 2ms 4 Nov 2025 326th blaztoma 🇱🇹 789 145 123ms 17 days ago 327th sean-niemann 🇺🇸 789 153 83ms 7 Jul 2025 328th NerdyMcNerd42 788 145 9ms 13 May 2023 328th mathisfun271 788 145 10ms 18 Feb 2024 328th neihousaigaai 788 145 9ms 10 Apr 2025 331st SirBogman 🇺🇸 788 199 41ms 3 Jun 2025 332nd DialFrost 🇸🇬 787 110 342ms 14 Jan 2024 333rd duckyluuk 🇳🇱 787 123 588ms 27 Mar 2024 333rd sean-niemann 🇺🇸 787 123 599ms 27 Jan 2025 335th Natanaelel 🇸🇪 786 89 33ms 11 Feb 2024 336th MeWhenI 🇻🇦 786 106 4ms 16 Aug 2024 337th LukeBridges 🇬🇧 786 142 9ms 20 Sep 2024 338th ovs-code 🇩🇪 785 128 2ms 16 Feb 2024 339th emgordon154 784 168 577ms 8 Jun 2025 340th GolfingSuccess 🇬🇷 783 113 7ms 1 May 2023 341st Shanethegamer 🇺🇸 781 124 593ms 16 Jan 2024 342nd itsh01 781 143 9ms 1 May 2023 343rd kg583 🇺🇸 781 164 4ms 2 days ago 344th 2bular 780 75 2ms 11 Nov 2025 345th GolfingSuccess 🇬🇷 779 107 4ms 18 Aug 2024 346th Shanethegamer 🇺🇸 779 150 116ms 24 May 2025 347th inventshah 779 155 443ms 1 May 2023 348th Shanethegamer 🇺🇸 779 180 2ms 5 May 2023 349th annaproxy 778 136 409ms 22 May 2023 350th commandblockguy 🇺🇸 777 147 16ms 1 May 2023 350th SniperSmiley 🇺🇸 777 147 9ms 15 Aug 2023 350th fourth-bit 777 147 15ms 2 Jul 2024 350th snoozingnewt 🇨🇦 777 147 9ms 31 Oct 2025 354th edsrzf 🇳🇿 776 168 3ms 14 Oct 2025 355th edsrzf 🇳🇿 773 155 63ms 27 Jul 2025 356th Shanethegamer 🇺🇸 772 137 405ms 26 Mar 2024 357th RDShah 772 148 9ms 3 May 2023 357th knutae 🇳🇴 772 148 10ms 13 Nov 2023 357th qpwoeirut 772 148 9ms 19 Sep 2025 360th lifthrasiir 🇰🇷 770 76 2ms 6 Dec 2024 360th emgordon154 770 76 2ms 8 Jun 2025 362nd DialFrost 🇸🇬 770 182 2ms 14 Sep 2024 363rd Steffan153 🇫🇮 769 181 432ms 4 May 2023 364th lifthrasiir 🇰🇷 768 126 541ms 2 Dec 2024 365th Shanethegamer 🇺🇸 768 140 4ms 2 May 2023 366th Shanethegamer 🇺🇸 768 174 5ms 4 Oct 2024 367th MeWhenI 🇻🇦 767 73 53ms 1 May 2023 368th MeWhenI 🇻🇦 767 138 399ms 26 Jul 2023 369th scpchicken 🇵🇼 767 149 9ms 1 May 2023 369th Emutis 🇱🇹 767 149 9ms 26 Oct 2025 371st DialFrost 🇸🇬 766 159 3ms 14 Jan 2024 372nd sean-niemann 🇺🇸 766 169 40ms 9 Dec 2023 373rd dylanarmstrong 765 146 9ms 23 Jan 2024 373rd two-bad 🇬🇧 765 146 8ms 24 Feb 2024 375th plcc0 762 150 10ms 9 Oct 2025 376th emplv 🇱🇻 761 210 267ms 6 May 2023 377th stefangimmillaro 760 135 3,975ms 14 Nov 2024 378th Shanethegamer 🇺🇸 759 114 377ms 9 May 2023 379th Anonymousellama21 757 151 9ms 9 Aug 2024 380th janbehrens 🇩🇪 757 174 439ms 1 May 2023 381st edsrzf 🇳🇿 757 211 276ms 16 Apr 2025 382nd stefangimmillaro 757 229 170ms 4 Jun 2025 383rd CaedenHarper 🇨🇦 756 128 570ms 11 Aug 2025 384th ovs-code 🇩🇪 756 311 8ms 8 Jul 2024 385th Protothor 754 148 9ms 31 May 2025 385th snoozingnewt 🇨🇦 754 148 8ms 31 Oct 2025 387th stefangimmillaro 753 212 265ms 5 May 2025 388th Bmrl7 752 152 9ms 20 Feb 2024 389th DialFrost 🇸🇬 750 78 2ms 10 Feb 2024 390th DialFrost 🇸🇬 750 129 728ms 17 Jan 2024 391st inventshah 750 134 2ms 1 May 2023 392nd edsrzf 🇳🇿 749 158 67ms 3 Jul 2025 393rd Shanethegamer 🇺🇸 749 192 137ms 3 May 2023 394th SirBogman 🇺🇸 748 102 293ms 18 May 2024 395th AlephSquirrel 747 153 9ms 1 May 2023 395th MaxElf999 747 153 9ms 2 May 2023 395th logvp 747 153 9ms 7 Oct 2024 398th emgordon154 745 130 498ms 1 May 2025 399th sean-niemann 🇺🇸 745 135 2ms 7 Jul 2025 400th erikgaal 744 150 9ms 19 Jul 2023 First Prev 321–400 of 832 Next Last