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 561st prplz 🇦🇺 720 81 870ms 17 Jun 2020 561st Feniske 🇫🇷 720 81 2,585ms 26 Nov 2023 563rd xyangst 720 105 13ms 4 Oct 2024 563rd Salutations45 720 105 13ms 11 Jan 2025 565th ndren 719 90 462ms 5 May 2024 565th DialFrost 🇸🇬 719 90 434ms 4 Jun 2024 567th inventshah 719 100 22ms 14 Apr 2021 567th lynn 719 100 18ms 29 Nov 2021 567th CedricGebistorf 719 100 19ms 2 Mar 2022 567th scpchicken 🇵🇼 719 100 20ms 4 May 2022 567th AlephSquirrel 719 100 26ms 6 Dec 2022 567th bricknellj 719 100 21ms 25 Jan 2023 567th LogicalJoe 719 100 19ms 24 May 2023 567th janbehrens 🇩🇪 719 100 21ms 17 Jun 2023 567th bizy-coder 719 100 20ms 27 Jan 2024 567th 5cw 🇺🇸 719 100 19ms 5 Jul 2024 567th firegene 🇮🇪 719 100 21ms 30 Jan 2025 567th edsrzf 🇳🇿 719 100 20ms 29 Jun 2025 567th KasperKivimaeki 🇫🇮 719 100 22ms 30 Jun 2025 567th wuduculfre 719 100 18ms 22 Jul 2025 581st Shanethegamer 🇺🇸 714 88 8ms 30 Oct 2023 582nd Attero 🇸🇪 713 106 16ms 28 Oct 2020 582nd jared-hughes 713 106 15ms 3 Aug 2022 582nd coreynash 713 106 14ms 16 Feb 2024 585th antimon2 🇯🇵 712 83 1,359ms 18 Aug 2025 586th mrondon8 712 101 20ms 5 Sep 2021 586th Artemis21 🇬🇧 712 101 20ms 10 Jan 2025 586th blaztoma 🇱🇹 712 101 18ms 3 days ago 589th Shanethegamer 🇺🇸 712 139 39ms 30 Jun 2022 590th HPWiz 🇳🇿 711 48 41ms 4 Oct 2021 591st AlephSquirrel 711 91 537ms 21 Jan 2024 591st Jacob385 711 91 396ms 13 Nov 2024 593rd ovs-code 🇩🇪 709 92 147ms 20 Nov 2024 593rd dokutan 709 92 139ms 20 Apr 2025 595th raphaelimahorn 707 107 13ms 17 Aug 2021 595th scpchicken 🇵🇼 707 107 12ms 26 Jan 2022 595th itsh01 707 107 13ms 3 Apr 2022 595th solmyr2000 707 107 13ms 11 Jun 2022 595th rifatx 707 107 13ms 17 Mar 2023 595th acollett89 707 107 12ms 4 Aug 2025 601st Attero 🇸🇪 705 102 25ms 25 Sep 2020 602nd Shanethegamer 🇺🇸 704 115 59ms 30 Oct 2023 603rd user189032 703 158 296ms 30 May 2019 604th Yewzir 🇧🇪 702 172 44ms 9 Jun 2024 605th Alessandro-Balconi 🇮🇹 699 49 86ms 14 Jul 2023 605th Shanethegamer 🇺🇸 699 49 91ms 7 Dec 2024 607th strout 699 159 331ms 14 Dec 2023 608th HumanoidCPU 698 103 22ms 7 Jun 2024 609th andersk 🇺🇸 698 162 150ms 18 Mar 2020 610th m-tkach 🇺🇦 696 117 4ms 21 Jan 2022 611th primo-ppcg 🇹🇭 696 145 628ms 1 Jun 2020 612th CaedenHarper 🇨🇦 695 85 256ms 22 Aug 2025 613th emgordon154 695 93 397ms 24 Sep 2024 614th CaedenHarper 🇨🇦 695 160 255ms 22 Aug 2025 615th SirBogman 🇺🇸 694 84 3,301ms 18 May 2024 616th ovs-code 🇩🇪 694 86 20ms 4 Oct 2024 617th DialFrost 🇸🇬 694 94 152ms 4 Aug 2024 618th jake-freeman 694 109 14ms 13 May 2020 618th ArmaanAS 694 109 14ms 7 Mar 2021 618th voytxt 🇨🇿 694 109 17ms 12 Jul 2024 621st CaedenHarper 🇨🇦 694 129 5ms 22 Aug 2025 622nd lynn 692 117 71ms 30 Nov 2021 623rd NewDefectus 🇮🇱 691 104 19ms 16 Oct 2021 624th emgordon154 691 111 2,746ms 13 Dec 2024 625th Shanethegamer 🇺🇸 691 113 351ms 31 Oct 2023 626th stefangimmillaro 690 113 7ms 7 Nov 2023 627th Yewzir 🇧🇪 690 130 390ms 15 Nov 2025 628th retrohun 688 114 2,371ms 16 Aug 2025 629th Shanethegamer 🇺🇸 688 146 3,285ms 9 Jan 2022 629th Yewzir 🇧🇪 688 146 62ms 10 Jun 2024 631st helbling 🇨🇭 687 110 21ms 3 Sep 2025 631st Lv0Sys 🇵🇱 687 110 13ms 22 days ago 633rd blaztoma 🇱🇹 686 70 51ms 22 Nov 2025 634th rucin93 🇵🇱 686 95 163ms 31 Oct 2024 635th Yewzir 🇧🇪 686 135 10ms 9 Jun 2024 636th yzhs 🇩🇪 686 162 298ms 25 Jul 2021 637th yzhs 🇩🇪 685 105 18ms 25 Oct 2020 637th Espiobest 685 105 21ms 26 Feb 2021 637th mokymok 🇺🇸 685 105 20ms 27 Sep 2021 640th Natanaelel 🇸🇪 683 73 242ms 16 Feb 2023 First Prev 561–640 of 1,450 Next Last