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 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 321st fkantelberg 748 109 10ms 25 Jul 2023 322nd ericlangedijk 🇸🇮 748 131 400ms 22 May 2023 322nd revlayle 🇺🇸 748 131 401ms 7 Jun 2023 322nd AdrienHache 🇫🇷 748 131 413ms 28 Dec 2024 325th Shanethegamer 🇺🇸 748 140 4ms 2 May 2023 326th emplv 🇱🇻 748 210 267ms 6 May 2023 327th Waffle3z 747 155 1ms 14 Sep 2023 327th edsrzf 🇳🇿 747 155 1ms 22 Aug 2025 329th edsrzf 🇳🇿 744 211 276ms 16 Apr 2025 330th ovs-code 🇩🇪 743 102 517ms 2 Mar 2024 331st Salutations45 743 129 9ms 3 Dec 2024 331st targrik 743 129 8ms 9 Jun 2025 333rd Shanethegamer 🇺🇸 743 156 1ms 5 May 2023 334th ovs-code 🇩🇪 743 287 8ms 8 Jul 2024 335th stefangimmillaro 742 83 37ms 24 May 2025 336th GolfingSuccess 🇬🇷 742 89 7ms 1 May 2023 337th edsrzf 🇳🇿 742 155 63ms 27 Jul 2025 338th jmerle 🇳🇱 741 110 10ms 11 Jul 2023 338th SB-945 741 110 9ms 13 Jan 2024 340th Steffan153 🇫🇮 740 180 418ms 4 May 2023 341st janbehrens 🇩🇪 739 174 439ms 1 May 2023 342nd alemelis 738 102 1,096ms 5 Oct 2024 343rd uttumuttu 🇫🇮 738 130 9ms 22 Dec 2023 344th MeWhenI 🇻🇦 738 134 6ms 9 May 2024 345th Shanethegamer 🇺🇸 737 192 137ms 3 May 2023 346th stefangimmillaro 737 205 170ms 4 Jun 2025 347th anter69 🇭🇺 734 84 38ms 27 Mar 2024 348th MeWhenI 🇻🇦 730 194 135ms 1 May 2023 349th MeWhenI 🇻🇦 730 215 271ms 1 May 2023 349th Shanethegamer 🇺🇸 730 215 278ms 14 Jul 2023 351st DialFrost 🇸🇬 726 132 9ms 11 Oct 2023 352nd mtirado1 724 160 1ms 1 May 2023 353rd KatieLG 🇬🇧 722 105 372ms 6 Oct 2025 354th dokutan 722 137 7ms 4 Oct 2024 355th janbehrens 🇩🇪 721 133 9ms 17 Jun 2023 355th KingSkyrock 🇺🇸 721 133 9ms 15 Oct 2024 357th annaproxy 721 136 409ms 22 May 2023 357th Shanethegamer 🇺🇸 721 136 406ms 26 Mar 2024 359th sean-niemann 🇺🇸 720 135 2ms 7 Jul 2025 360th Shanethegamer 🇺🇸 720 172 2ms 10 May 2023 361st DialFrost 🇸🇬 719 76 2ms 10 Feb 2024 361st lifthrasiir 🇰🇷 719 76 2ms 6 Dec 2024 361st emgordon154 719 76 2ms 8 Jun 2025 364th Shanethegamer 🇺🇸 718 173 4ms 19 Oct 2024 365th tatzyr 🇯🇵 717 86 33ms 24 Feb 2025 366th adamnielson42 🇺🇸 717 104 3ms 10 Jan 2024 367th RockOfStone 715 162 2ms 4 Nov 2025 368th stefangimmillaro 715 198 1,762ms 13 Oct 2024 369th jared-hughes 710 135 9ms 28 Jul 2023 369th Argeento 🇵🇱 710 135 9ms 8 Sep 2023 369th itserasmus 710 135 9ms 17 Jan 2024 372nd MeWhenI 🇻🇦 710 138 399ms 26 Jul 2023 373rd MeWhenI 🇻🇦 710 148 99ms 7 Aug 2023 374th jeff-at-tamer-dot-codes 🇺🇸 709 115 10ms 17 May 2023 374th yzhs 🇩🇪 709 115 10ms 22 Jun 2023 376th TFeld00 🇩🇰 708 87 53ms 3 Sep 2024 377th janbehrens 🇩🇪 708 188 395ms 1 May 2023 378th AlephSquirrel 705 61 48ms 1 May 2023 379th madex 🇩🇪 705 136 9ms 24 Jul 2025 380th luuumine 🇫🇷 703 116 10ms 27 Oct 2025 381st cbrt-x 703 183 117ms 20 Jan 2025 382nd GrayJoKing 🇦🇺 702 117 132ms 12 Aug 2024 383rd snoozingnewt 🇨🇦 701 190 552ms 31 Oct 2025 384th stefangimmillaro 701 220 41ms 6 May 2025 385th CaedenHarper 🇨🇦 701 224 249ms 12 Nov 2025 386th UnderKoen 🇳🇱 701 228 2ms 20 Jan 2025 387th olleicua 🇺🇸 700 137 9ms 3 Feb 2024 387th CaedenHarper 🇨🇦 700 137 8ms 23 Aug 2025 389th stefangimmillaro 700 140 406ms 9 Sep 2023 390th MeWhenI 🇻🇦 700 177 2ms 1 May 2023 391st DialFrost 🇸🇬 700 193 2ms 26 Jan 2024 392nd MeWhenI 🇻🇦 699 184 496ms 1 May 2023 393rd MeWhenI 🇻🇦 697 107 3ms 1 May 2023 394th bizy-coder 696 109 522ms 11 Oct 2024 395th Yax42 🇫🇷 695 138 9ms 13 Nov 2025 396th blaztoma 🇱🇹 692 89 36ms 26 Oct 2025 397th emgordon154 690 119 120ms 6 Sep 2024 398th DialFrost 🇸🇬 689 152 4ms 17 Jun 2024 399th adyache 🇺🇸 689 169 7ms 24 May 2023 400th retrohun 688 139 3ms 27 May 2023 First Prev 321–400 of 828 Next Last