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 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 561st primo-ppcg 🇹🇭 759 106 383ms 10 Apr 2025 562nd MeWhenI 🇻🇦 758 108 58ms 30 Oct 2023 563rd MeWhenI 🇻🇦 757 136 85ms 10 Apr 2024 564th janbehrens 🇩🇪 755 105 3,190ms 18 May 2023 565th vishwathg 754 126 21ms 2 Feb 2023 566th MeWhenI 🇻🇦 753 77 5ms 16 Apr 2023 566th janbehrens 🇩🇪 753 77 6ms 18 May 2023 568th sean-niemann 🇺🇸 752 107 377ms 31 Oct 2023 569th MeWhenI 🇻🇦 752 119 83ms 12 Dec 2023 570th Feniske 🇫🇷 750 81 2,585ms 26 Nov 2023 571st inventshah 750 85 10ms 15 Nov 2022 572nd primo-ppcg 🇹🇭 750 121 365ms 17 Apr 2022 573rd Yewzir 🇧🇪 750 123 168ms 9 Jun 2024 573rd CaedenHarper 🇨🇦 750 123 152ms 7 Nov 2025 575th MeWhenI 🇻🇦 749 112 12ms 23 May 2023 576th marcin7Cd 748 127 18ms 28 Sep 2019 576th annaproxy 748 127 20ms 9 May 2022 576th commandblockguy 🇺🇸 748 127 20ms 21 May 2023 579th CaedenHarper 🇨🇦 747 120 481ms 17 Aug 2025 580th Shanethegamer 🇺🇸 745 120 27ms 17 Dec 2023 581st janbehrens 🇩🇪 744 106 7ms 2 Jul 2023 581st Shanethegamer 🇺🇸 744 106 9ms 2 Jul 2023 583rd Yewzir 🇧🇪 744 217 2,776ms 14 Nov 2025 584th MeWhenI 🇻🇦 743 131 39ms 2 Oct 2022 584th dokutan 743 131 9ms 29 Apr 2025 586th daedals 742 128 20ms 31 May 2019 586th Indivicivet 742 128 20ms 26 Oct 2021 586th mathb0y512 742 128 22ms 11 Jan 2024 586th mathisfun271 742 128 41ms 13 Feb 2024 586th moustave 742 128 20ms 7 Apr 2025 591st jared-hughes 742 245 131ms 6 Jul 2024 592nd SirBogman 🇺🇸 739 78 40ms 20 Mar 2022 592nd CaedenHarper 🇨🇦 739 78 47ms 18 Aug 2025 594th Maznek 738 103 15ms 28 Jun 2023 595th Attero 🇸🇪 737 129 26ms 13 Oct 2020 595th jared-hughes 737 129 22ms 2 Oct 2021 595th ahmetdemirag 🇨🇾 737 129 23ms 4 Jul 2024 598th JRaspass 🇬🇧 737 132 9ms 1 Oct 2022 599th dokutan 737 139 473ms 13 Nov 2025 600th kg583 🇺🇸 736 114 13ms 28 Sep 2025 601st MeWhenI 🇻🇦 735 100 4,103ms 24 Oct 2024 602nd AlephSquirrel 734 138 5ms 29 Jul 2023 603rd prplz 🇦🇺 732 83 870ms 17 Jun 2020 604th prplz 🇦🇺 731 104 13ms 5 Oct 2020 604th CaedenHarper 🇨🇦 731 104 13ms 17 Aug 2025 606th MeWhenI 🇻🇦 731 128 33ms 10 Oct 2023 607th sultan 731 130 41ms 1 Mar 2024 607th Bmrl7 731 130 22ms 7 Mar 2024 609th treeowl 731 153 312ms 25 Feb 2019 610th SirBogman 🇺🇸 729 85 295ms 5 Oct 2020 611th lifthrasiir 🇰🇷 729 108 569ms 2 Dec 2024 612th GrayJoKing 🇦🇺 728 61 41ms 23 Oct 2020 613th Lydxn 🇨🇦 727 141 539ms 30 Jun 2021 614th laikoni 726 154 315ms 23 Feb 2019 615th CaedenHarper 🇨🇦 725 85 256ms 22 Aug 2025 616th Jacob385 725 131 39ms 1 Mar 2024 616th Anonymousellama21 725 131 22ms 16 May 2024 618th Shanethegamer 🇺🇸 724 88 8ms 30 Oct 2023 619th ETHproductions 🇺🇸 724 105 14ms 7 May 2018 619th Salutations45 724 105 13ms 11 Jan 2025 621st m-tkach 🇺🇦 724 117 4ms 21 Jan 2022 622nd joll05 🇸🇪 720 132 20ms 20 Aug 2020 622nd albanian-laundromat 720 132 21ms 16 Sep 2025 624th Shanethegamer 🇺🇸 719 139 39ms 30 Jun 2022 625th antimon2 🇯🇵 717 86 1,223ms 18 Aug 2025 626th Attero 🇸🇪 717 106 16ms 28 Oct 2020 626th jared-hughes 717 106 15ms 3 Aug 2022 626th coreynash 717 106 14ms 16 Feb 2024 629th lynn 716 62 42ms 24 Oct 2021 630th tkwa 715 133 22ms 4 Dec 2018 630th fourth-bit 715 133 38ms 13 Jul 2023 632nd Alessandro-Balconi 🇮🇹 714 49 86ms 14 Jul 2023 632nd Shanethegamer 🇺🇸 714 49 91ms 7 Dec 2024 634th Shanethegamer 🇺🇸 712 115 59ms 30 Oct 2023 635th raphaelimahorn 711 107 13ms 17 Aug 2021 635th scpchicken 🇵🇼 711 107 12ms 26 Jan 2022 635th itsh01 711 107 13ms 3 Apr 2022 635th solmyr2000 711 107 13ms 11 Jun 2022 635th rifatx 711 107 13ms 17 Mar 2023 635th acollett89 711 107 12ms 4 Aug 2025 First Prev 561–640 of 1,455 Next Last
