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 721st varhammer 🇷🇺 661 121 157ms 13 Dec 2023 722nd celiendonze 🇨🇭 660 144 20ms 14 Apr 2023 722nd Bulmenisaurus 660 144 18ms 1 Jul 2024 722nd emgordon154 660 144 21ms 23 Sep 2024 725th MeWhenI 🇻🇦 658 193 33ms 6 Jun 2023 726th CatsAreFluffy 656 94 59ms 4 Feb 2023 727th CaedenHarper 🇨🇦 656 142 213ms 18 Aug 2025 728th BBoehm 🇩🇪 655 116 13ms 21 Dec 2020 729th lmolteno 655 145 29ms 3 Mar 2021 729th guilhem-roy 🇫🇷 655 145 21ms 7 Mar 2022 729th jakobkordez 🇸🇮 655 145 20ms 31 Oct 2022 729th frankgraziano 655 145 20ms 24 Apr 2025 729th TheZwierzLF 🇵🇱 655 145 19ms 21 May 2025 734th Yewzir 🇧🇪 654 123 343ms 10 Jun 2024 735th orthoplex 🇨🇽 653 68 41ms 9 Oct 2020 736th villfa 652 121 15ms 2 Nov 2018 737th elgan65536 651 146 19ms 31 Mar 2024 737th InigoK 🇺🇸 651 146 24ms 26 Aug 2025 739th snyderek 🇺🇸 651 158 58ms 9 Nov 2024 740th hyvyys 650 117 14ms 19 Sep 2020 740th aksyristos 650 117 13ms 2 Nov 2022 742nd 386asm 🇺🇸 649 154 45ms 5 May 2023 743rd mrondon8 649 158 514ms 5 Sep 2021 744th MeWhenI 🇻🇦 647 58 6ms 16 Jan 2022 745th jupj 🇫🇮 647 131 3ms 27 Aug 2022 746th clementblaudeau 647 147 19ms 7 Jun 2021 746th StefanHabel 🇨🇦 647 147 19ms 31 Dec 2022 746th yuchuehw 647 147 21ms 3 Jan 2024 749th RockOfStone 645 140 15ms 17 Mar 2024 750th user189032 644 118 14ms 29 May 2019 750th cywong-amino 🇭🇰 644 118 31ms 7 Oct 2020 750th dokutan 644 118 13ms 18 Apr 2025 753rd janbehrens 🇩🇪 643 160 64ms 18 May 2023 754th yokasuretsu 642 148 28ms 21 Apr 2018 754th AgathokakologicalBit 642 148 27ms 3 Aug 2019 754th TaserTheFox 🇺🇸 642 148 19ms 8 May 2023 754th adamnielson42 🇺🇸 642 148 20ms 8 Aug 2023 754th jtaxen 642 148 22ms 28 Apr 2024 754th o0BlackDragon0o 642 148 28ms 8 Sep 2024 754th Bombalech 642 148 26ms 8 Sep 2024 754th wh3n3v3r 🇨🇿 642 148 18ms 8 Nov 2024 762nd jared-hughes 641 141 14ms 16 Apr 2022 763rd CaedenHarper 🇨🇦 639 97 152ms 18 Aug 2025 764th unfinishedprogram 639 119 12ms 12 Jul 2024 765th olligobber 🇦🇺 639 175 291ms 21 May 2020 766th pzagrebin 636 97 55ms 25 Aug 2022 767th dokutan 636 142 11ms 29 Mar 2025 768th janbehrens 🇩🇪 636 161 590ms 16 May 2023 769th thisishowmymindworks 🇳🇴 634 120 13ms 5 Oct 2020 769th PatrickStephansen 🇿🇦 634 120 25ms 9 Jun 2021 769th stefangabos 🇷🇴 634 120 14ms 13 Sep 2022 772nd sambirnbaum1 634 150 19ms 6 Sep 2019 772nd MaxElf999 634 150 26ms 20 Oct 2022 772nd nstearns96 🇬🇧 634 150 26ms 8 Dec 2022 772nd Florian-Mt 634 150 19ms 14 Nov 2023 776th Yewzir 🇧🇪 632 134 4ms 10 Jun 2024 777th Jiramide 632 177 296ms 8 Feb 2021 778th MeWhenI 🇻🇦 631 103 923ms 15 Sep 2025 779th albanian-laundromat 630 125 602ms 9 Aug 2025 780th MarcMush 🇫🇷 629 98 1,208ms 11 Jan 2024 781st dokutan 629 128 151ms 6 Jun 2025 782nd ian-h-chamberlain 🇺🇸 629 151 21ms 17 Dec 2019 782nd qwjhvbxi 629 151 19ms 7 Feb 2024 784th jared-hughes 626 92 56ms 20 Sep 2022 785th Natanaelel 🇸🇪 625 71 41ms 16 Nov 2021 785th DialFrost 🇸🇬 625 71 39ms 31 Jan 2024 785th 4hg 🇺🇸 625 71 46ms 19 Jun 2024 788th galloj 🇨🇿 625 152 20ms 10 Jan 2023 788th Artemis21 🇬🇧 625 152 21ms 2 Jan 2025 790th YAJUE114514 625 179 292ms 3 Aug 2025 791st JOrE20 🇺🇸 623 122 15ms 7 Nov 2025 792nd myfatemi04 621 153 21ms 10 Jan 2018 792nd jhpaques 🇫🇷 621 153 19ms 28 Jul 2022 794th sebipopa 🇷🇴 618 123 13ms 14 Sep 2022 794th xyangst 618 123 12ms 4 Oct 2024 796th SirBogman 🇺🇸 617 94 19ms 5 Oct 2020 797th RDShah 617 154 24ms 31 Jan 2020 797th dzshn 617 154 17ms 9 Jun 2021 797th bbakersmith 617 154 28ms 28 Jun 2022 797th aksyristos 617 154 21ms 8 Mar 2023 First Prev 721–800 of 1,458 Next Last