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 400th robertvansteen 744 150 9ms 19 Jul 2023 402nd MeWhenI 🇻🇦 743 215 271ms 1 May 2023 403rd MeWhenI 🇻🇦 741 194 135ms 1 May 2023 404th stefangimmillaro 740 143 428ms 15 Jul 2023 405th Shanethegamer 🇺🇸 740 173 4ms 19 Oct 2024 406th janbehrens 🇩🇪 740 188 395ms 1 May 2023 407th MeWhenI 🇻🇦 739 131 569ms 24 May 2024 408th Shanethegamer 🇺🇸 739 216 264ms 14 Jul 2023 409th jacobly0 🇺🇸 739 262 1,649ms 22 Apr 2024 410th MeWhenI 🇻🇦 738 84 2ms 1 May 2023 411th ovs-code 🇩🇪 738 165 3ms 27 Sep 2024 412th janbehrens 🇩🇪 735 144 380ms 1 May 2023 413th BambooleanLogic 🇸🇪 734 152 9ms 28 Jun 2023 414th neel11235813 733 132 732ms 10 Mar 2024 415th hellwue 732 156 10ms 3 May 2023 415th hiichbindermax 732 156 9ms 4 May 2023 415th albanian-laundromat 732 156 9ms 23 Apr 2025 415th zhaohm14 732 156 10ms 23 Jul 2025 419th snoozingnewt 🇨🇦 732 190 552ms 31 Oct 2025 420th Salutations45 729 153 9ms 3 Dec 2024 421st stefangimmillaro 728 94 35ms 23 May 2025 422nd GolfingSuccess 🇬🇷 728 133 677ms 2 Mar 2024 423rd stefangimmillaro 726 198 1,762ms 3 Apr 2024 424th DialFrost 🇸🇬 723 144 107ms 25 days ago 425th alemelis 723 158 9ms 5 Oct 2024 426th MeWhenI 🇻🇦 723 177 1ms 1 May 2023 427th MeWhenI 🇻🇦 722 109 3ms 1 May 2023 428th anter69 🇭🇺 720 95 41ms 1 Oct 2024 429th madeforlosers 720 155 9ms 8 May 2025 429th Yax42 🇫🇷 720 155 8ms 13 Nov 2025 431st dokutan 720 184 7ms 3 Oct 2024 432nd KatieLG 🇬🇧 719 159 9ms 6 Apr 2025 432nd andrewjc2000 719 159 9ms 30 Apr 2025 434th inventshah 719 191 2ms 11 Jan 2024 434th Yewzir 🇧🇪 719 191 2ms 19 Nov 2025 436th Alessandro-Balconi 🇮🇹 718 145 77ms 1 May 2023 437th SirBogman 🇺🇸 717 135 747ms 16 Jan 2024 438th MeWhenI 🇻🇦 716 184 496ms 1 May 2023 439th MeWhenI 🇻🇦 715 121 390ms 26 Aug 2023 440th 5cw 🇺🇸 713 82 2ms 1 May 2023 441st CaedenHarper 🇨🇦 713 224 249ms 12 Nov 2025 442nd Shanethegamer 🇺🇸 711 147 15ms 17 May 2023 443rd KingSkyrock 🇺🇸 711 157 9ms 15 Oct 2024 443rd iczelia 🇩🇪 711 157 8ms 23 Oct 2025 445th Mabeloid 🇳🇴 711 180 1ms 21 Sep 2024 446th UnderKoen 🇳🇱 711 228 2ms 20 Jan 2025 447th chartung17 710 161 9ms 1 Jan 2024 447th xdaniel-lim 710 161 9ms 27 Jan 2025 449th DialFrost 🇸🇬 708 151 128ms 28 Oct 2024 450th albanian-laundromat 708 198 3ms 7 Jul 2025 451st edsrzf 🇳🇿 708 245 197ms 17 Jun 2025 452nd Mabeloid 🇳🇴 707 137 715ms 4 May 2025 453rd stefangimmillaro 706 222 41ms 6 May 2025 454th StefanHabel 🇨🇦 705 162 10ms 13 Aug 2023 454th SB-945 705 162 9ms 13 Jan 2024 454th markusgraube 705 162 10ms 26 Mar 2024 457th emgordon154 705 246 175ms 14 Mar 2025 458th janbehrens 🇩🇪 704 123 661ms 1 May 2023 459th emgordon154 704 182 4ms 27 Dec 2024 460th duckyluuk 🇳🇱 703 146 3,684ms 25 Oct 2024 461st snoozingnewt 🇨🇦 703 182 2ms 31 Oct 2025 462nd itserasmus 702 159 9ms 17 Jan 2024 463rd commandblockguy 🇺🇸 701 138 693ms 1 Sep 2025 464th FlorianCassayre 🇫🇷 701 163 9ms 24 Sep 2023 464th YAJUE114514 701 163 10ms 4 days ago 466th DialFrost 🇸🇬 700 109 258ms 14 Jun 2024 467th CatsAreFluffy 699 95 55ms 8 Jan 2024 468th MeWhenI 🇻🇦 699 336 7ms 29 Nov 2023 469th madex 🇩🇪 698 160 9ms 24 Jul 2025 470th adoxography 697 164 9ms 22 May 2023 470th wh3n3v3r 🇨🇿 697 164 10ms 13 Nov 2024 470th snydej 697 164 9ms 21 Nov 2024 473rd jared-hughes 697 190 148ms 11 Sep 2023 474th MeWhenI 🇻🇦 697 197 2ms 11 Oct 2023 475th MeWhenI 🇻🇦 696 186 496ms 1 May 2023 476th Shanethegamer 🇺🇸 694 174 477ms 1 May 2023 477th elgan65536 694 250 333ms 26 Oct 2023 478th AshyIsMe 🇦🇺 693 101 34ms 2 May 2023 479th olleicua 🇺🇸 693 161 9ms 3 Feb 2024 480th rozium 693 165 9ms 11 Oct 2024 First Prev 401–480 of 830 Next Last