The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Roman to Arabic 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 798th moustave 562 128 20ms 7 Apr 2025 802nd melven 561 215 42ms 16 Oct 2025 803rd HumanoidCPU 560 135 15ms 8 Jun 2024 804th GrayJoKing 🇦🇺 559 61 41ms 23 Oct 2020 805th Jacob385 558 181 568ms 28 Oct 2025 806th CaedenHarper 🇨🇦 557 117 150ms 17 Aug 2025 807th jared-hughes 557 129 22ms 2 Oct 2021 807th ahmetdemirag 🇨🇾 557 129 23ms 4 Jul 2024 809th BambooleanLogic 🇸🇪 556 136 22ms 3 Nov 2022 810th CaedenHarper 🇨🇦 556 141 3,494ms 17 Aug 2025 811th CaedenHarper 🇨🇦 555 181 84ms 16 Nov 2025 812th djeedjay 🇳🇱 554 147 3ms 6 Sep 2021 813th JunkIce 553 117 403ms 3 Dec 2024 814th Bmrl7 553 130 22ms 7 Mar 2024 815th emgordon154 552 221 112ms 10 Jun 2025 816th lynn 550 62 42ms 24 Oct 2021 817th Anonymousellama21 549 131 22ms 16 May 2024 818th uttumuttu 🇫🇮 548 138 16ms 5 Jan 2022 818th KaleChips22 548 138 13ms 3 Aug 2025 820th joll05 🇸🇪 545 132 20ms 20 Aug 2020 820th SnowballSH 545 132 26ms 3 Feb 2021 820th jeff-at-tamer-dot-codes 🇺🇸 545 132 22ms 25 Mar 2024 823rd ShiraJoseph 🇺🇸 544 139 16ms 25 Jun 2023 824th kkoenig 544 228 285ms 13 Sep 2024 825th UnderKoen 🇳🇱 542 225 117ms 8 Jul 2024 826th tkwa 540 133 22ms 4 Dec 2018 826th fourth-bit 540 133 38ms 13 Jul 2023 828th mckymsh 540 140 14ms 1 Mar 2022 829th phdphil 536 93 271ms 22 Apr 2018 830th relet 536 134 20ms 8 Aug 2018 831st bstrautin 535 109 3,894ms 26 Jul 2020 832nd jared-hughes 533 64 43ms 17 Apr 2022 833rd suwat513 532 135 40ms 15 Sep 2022 834th kevinmchung 529 136 26ms 3 Apr 2018 834th jarekwg 529 136 20ms 2 Oct 2020 834th OCNeve 529 136 18ms 18 Jun 2024 834th minhtrancccp 529 136 19ms 25 Nov 2024 838th xkacer 🇨🇿 529 143 15ms 25 Jan 2021 838th trinityy-7 529 143 15ms 17 Mar 2024 840th elgan65536 528 214 189ms 27 Mar 2024 841st neihousaigaai 525 137 20ms 6 Oct 2024 842nd emgordon154 525 144 18ms 9 Dec 2021 843rd adamnielson42 🇺🇸 522 77 39ms 7 Dec 2023 844th hiddicop 🇸🇪 522 92 56ms 1 Feb 2021 844th jared-hughes 522 92 56ms 20 Sep 2022 846th Kibble 522 145 13ms 4 Oct 2020 846th IchBinMichMarkus 522 145 16ms 11 Jul 2023 848th CaedenHarper 🇨🇦 522 373 598ms 22 Aug 2025 849th IISResetMe 521 112 792ms 8 Mar 2024 849th CaedenHarper 🇨🇦 521 112 317ms 22 Aug 2025 851st zbreit 🇺🇸 521 138 26ms 6 Aug 2020 851st rschwa6308 🇺🇸 521 138 28ms 6 Aug 2020 851st StardustGogeta 521 138 27ms 6 Aug 2020 851st mcjo163 521 138 27ms 2 Sep 2020 855th h3ra993huskp 🇯🇵 520 194 609ms 22 days ago 856th Stockoh 🇫🇷 517 139 34ms 27 Feb 2024 856th zhaohm14 517 139 19ms 10 Jun 2025 858th blaztoma 🇱🇹 516 174 191ms 9 Nov 2025 859th goodingc 516 219 153ms 3 Oct 2021 860th CaedenHarper 🇨🇦 514 97 152ms 18 Aug 2025 861st didion0 🇺🇸 514 147 17ms 23 Feb 2021 861st null-tangent 514 147 13ms 11 Sep 2022 863rd bwenstar 513 140 19ms 21 Feb 2024 864th jalone87 513 191 92ms 6 Feb 2020 865th jerrandolph 512 242 334ms 8 Nov 2023 866th tatzyr 🇯🇵 511 94 169ms 28 Dec 2024 867th rifatx 510 141 29ms 16 Mar 2023 867th quimey 510 141 20ms 20 Jul 2023 869th vgamula 🇺🇦 510 247 38ms 27 Jul 2023 870th ian-h-chamberlain 🇺🇸 508 149 13ms 19 Dec 2019 870th shreyasminocha 508 149 13ms 2 Aug 2020 870th xnacly 🇩🇪 508 149 13ms 27 Jun 2023 873rd NewDefectus 🇮🇱 506 87 20ms 16 Oct 2021 873rd Natanaelel 🇸🇪 506 87 7ms 16 Nov 2021 873rd scpchicken 🇵🇼 506 87 18ms 24 Nov 2022 876th Haksell 🇦🇶 506 142 20ms 13 Jun 2020 876th Fishron 506 142 18ms 19 Sep 2022 876th jatloe 506 142 18ms 6 Sep 2024 879th HumanoidCPU 506 245 281ms 26 Aug 2024 880th neihousaigaai 505 200 665ms 18 May 2021 First Prev 801–880 of 1,453 Next Last