The Calendar hole will go live in approximately 13 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 560th Feniske 🇫🇷 720 81 2,585ms 26 Nov 2023 562nd xyangst 720 105 13ms 4 Oct 2024 562nd Salutations45 720 105 13ms 11 Jan 2025 564th ndren 719 90 462ms 5 May 2024 564th DialFrost 🇸🇬 719 90 434ms 4 Jun 2024 566th inventshah 719 100 22ms 14 Apr 2021 566th lynn 719 100 18ms 29 Nov 2021 566th CedricGebistorf 719 100 19ms 2 Mar 2022 566th scpchicken 🇵🇼 719 100 20ms 4 May 2022 566th AlephSquirrel 719 100 26ms 6 Dec 2022 566th bricknellj 719 100 21ms 25 Jan 2023 566th LogicalJoe 719 100 19ms 24 May 2023 566th janbehrens 🇩🇪 719 100 21ms 17 Jun 2023 566th bizy-coder 719 100 20ms 27 Jan 2024 566th 5cw 🇺🇸 719 100 19ms 5 Jul 2024 566th firegene 🇮🇪 719 100 21ms 30 Jan 2025 566th edsrzf 🇳🇿 719 100 20ms 29 Jun 2025 566th KasperKivimaeki 🇫🇮 719 100 22ms 30 Jun 2025 566th wuduculfre 719 100 18ms 22 Jul 2025 580th Shanethegamer 🇺🇸 714 88 8ms 30 Oct 2023 581st Attero 🇸🇪 713 106 16ms 28 Oct 2020 581st jared-hughes 713 106 15ms 3 Aug 2022 581st coreynash 713 106 14ms 16 Feb 2024 584th antimon2 🇯🇵 712 83 1,359ms 18 Aug 2025 585th mrondon8 712 101 20ms 5 Sep 2021 585th Artemis21 🇬🇧 712 101 20ms 10 Jan 2025 587th Shanethegamer 🇺🇸 712 139 39ms 30 Jun 2022 588th HPWiz 🇳🇿 711 48 41ms 4 Oct 2021 589th AlephSquirrel 711 91 537ms 21 Jan 2024 589th Jacob385 711 91 396ms 13 Nov 2024 591st ovs-code 🇩🇪 709 92 147ms 20 Nov 2024 591st dokutan 709 92 139ms 20 Apr 2025 593rd raphaelimahorn 707 107 13ms 17 Aug 2021 593rd scpchicken 🇵🇼 707 107 12ms 26 Jan 2022 593rd itsh01 707 107 13ms 3 Apr 2022 593rd solmyr2000 707 107 13ms 11 Jun 2022 593rd rifatx 707 107 13ms 17 Mar 2023 593rd acollett89 707 107 12ms 4 Aug 2025 599th Attero 🇸🇪 705 102 25ms 25 Sep 2020 600th Shanethegamer 🇺🇸 704 115 59ms 30 Oct 2023 601st user189032 703 158 296ms 30 May 2019 602nd Yewzir 🇧🇪 702 172 44ms 9 Jun 2024 603rd Alessandro-Balconi 🇮🇹 699 49 86ms 14 Jul 2023 603rd Shanethegamer 🇺🇸 699 49 91ms 7 Dec 2024 605th strout 699 159 331ms 14 Dec 2023 606th HumanoidCPU 698 103 22ms 7 Jun 2024 607th andersk 🇺🇸 698 162 150ms 18 Mar 2020 608th m-tkach 🇺🇦 696 117 4ms 21 Jan 2022 609th CaedenHarper 🇨🇦 695 85 256ms 22 Aug 2025 610th emgordon154 695 93 397ms 24 Sep 2024 611th primo-ppcg 🇹🇭 695 145 628ms 1 Jun 2020 612th CaedenHarper 🇨🇦 695 160 255ms 22 Aug 2025 613th SirBogman 🇺🇸 694 84 3,301ms 18 May 2024 614th ovs-code 🇩🇪 694 86 20ms 4 Oct 2024 615th DialFrost 🇸🇬 694 94 152ms 4 Aug 2024 616th jake-freeman 694 109 14ms 13 May 2020 616th ArmaanAS 694 109 14ms 7 Mar 2021 616th voytxt 🇨🇿 694 109 17ms 12 Jul 2024 619th CaedenHarper 🇨🇦 694 129 5ms 22 Aug 2025 620th lynn 692 117 71ms 30 Nov 2021 621st NewDefectus 🇮🇱 691 104 19ms 16 Oct 2021 622nd emgordon154 691 111 2,746ms 13 Dec 2024 623rd Shanethegamer 🇺🇸 691 113 351ms 31 Oct 2023 624th stefangimmillaro 690 113 7ms 7 Nov 2023 625th Yewzir 🇧🇪 690 130 390ms 15 Nov 2025 626th retrohun 688 114 2,371ms 16 Aug 2025 627th Shanethegamer 🇺🇸 688 146 3,285ms 9 Jan 2022 627th Yewzir 🇧🇪 688 146 62ms 10 Jun 2024 629th helbling 🇨🇭 687 110 21ms 3 Sep 2025 629th Lv0Sys 🇵🇱 687 110 13ms 19 days ago 631st blaztoma 🇱🇹 686 70 51ms 26 days ago 632nd rucin93 🇵🇱 686 95 163ms 31 Oct 2024 633rd Yewzir 🇧🇪 686 135 10ms 9 Jun 2024 634th yzhs 🇩🇪 686 162 298ms 25 Jul 2021 635th yzhs 🇩🇪 685 105 18ms 25 Oct 2020 635th Espiobest 685 105 21ms 26 Feb 2021 635th mokymok 🇺🇸 685 105 20ms 27 Sep 2021 638th Natanaelel 🇸🇪 683 73 242ms 16 Feb 2023 639th XenThe 🇬🇧 681 111 12ms 1 Jul 2025 640th CaedenHarper 🇨🇦 681 136 11ms 22 Aug 2025 First Prev 561–640 of 1,448 Next Last