The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Arabic to Roman 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 877th WillConker 619 195 24ms 10 Aug 2024 877th Troon 619 195 21ms 19 Aug 2025 883rd MeWhenI 🇻🇦 618 146 425ms 15 Feb 2023 884th MeWhenI 🇻🇦 618 223 1,338ms 16 Jun 2023 885th DialFrost 🇸🇬 616 102 8ms 15 Apr 2025 886th daisy-lau 616 149 12ms 13 Jul 2020 886th satowine1 616 149 14ms 7 Dec 2021 886th Ashikpaul 🇮🇳 616 149 13ms 29 Jul 2022 886th Maznek 616 149 23ms 21 Jun 2023 890th wilkij1 616 196 17ms 16 Jun 2018 890th lukasthaler 616 196 28ms 9 Sep 2020 890th asadullayev 616 196 19ms 4 Mar 2021 890th geooff 616 196 21ms 11 Sep 2023 890th RaBa21 🇭🇺 616 196 21ms 17 Jul 2025 890th BlankSpruce 616 196 26ms 31 Aug 2025 896th bac0id 615 219 404ms 3 Jul 2024 897th Shanethegamer 🇺🇸 615 237 332ms 23 Feb 2023 898th vonagam 614 133 51ms 12 Nov 2017 899th MeWhenI 🇻🇦 614 265 56ms 16 Jun 2023 900th labster 613 161 3,673ms 15 Mar 2018 901st BrenSchaap 613 197 20ms 21 Oct 2021 901st aksyristos 613 197 23ms 27 Jan 2023 901st ABC00012345 613 197 22ms 1 May 2024 901st michaelmgreer 613 197 21ms 9 Oct 2025 905th arjanadriaanse 🇳🇱 613 238 348ms 7 Feb 2022 906th unfinishedprogram 612 150 14ms 19 Jan 2024 907th janbehrens 🇩🇪 612 186 482ms 24 Mar 2022 908th MeWhenI 🇻🇦 611 155 32ms 16 Aug 2024 909th duckyluuk 🇳🇱 611 187 4,439ms 26 Oct 2024 910th ccbrown 611 255 324ms 21 Apr 2020 911th dokutan 610 109 96ms 22 Jan 2024 912th zdzc 610 198 20ms 26 Mar 2018 912th Florian-Mt 610 198 28ms 14 Nov 2023 912th l-donovan 610 198 22ms 6 Feb 2024 915th Tezaruz 608 151 18ms 20 Dec 2023 915th itserasmus 608 151 15ms 25 Jan 2024 915th olleicua 🇺🇸 608 151 15ms 16 Feb 2024 918th Andrey2001 608 171 667ms 22 days ago 919th davidwangd 608 240 361ms 6 Apr 2025 920th MeWhenI 🇻🇦 606 163 67ms 3 Jul 2023 921st lelbal 606 199 17ms 7 Aug 2025 921st qpwoeirut 606 199 20ms 14 Aug 2025 923rd hrrs01 605 135 47ms 21 Sep 2018 923rd sapphyrus 605 135 48ms 18 Feb 2020 923rd KevinMarquette 🇺🇸 605 135 1,152ms 17 Apr 2022 926th msbranicky 605 172 768ms 19 Jan 2024 927th omurakazuaki 🇯🇵 604 152 13ms 15 Feb 2021 927th biocommando 🇫🇮 604 152 19ms 19 Aug 2023 927th hacker112 🇸🇪 604 152 14ms 19 Jun 2024 927th eTrey13 604 152 13ms 3 Feb 2025 927th SOONwasTaken 604 152 13ms 1 Oct 2025 932nd Yewzir 🇧🇪 603 147 1,108ms 16 Nov 2025 933rd hoodadam 603 200 17ms 5 Jun 2019 933rd Pena86 603 200 19ms 6 Jan 2022 933rd damoc1es 603 200 18ms 4 Dec 2022 933rd zekestephens 603 200 24ms 25 Oct 2025 937th Shanethegamer 🇺🇸 602 189 506ms 14 Jul 2023 938th RockOfStone 602 213 5ms 22 Dec 2022 939th kieraneglin 601 136 44ms 8 Nov 2017 939th proton 🇩🇪 601 136 45ms 5 Jun 2020 939th hiddicop 🇸🇪 601 136 48ms 26 Jan 2021 942nd anoopsg 🇮🇳 601 207 109ms 18 Nov 2023 943rd Ivraj 600 153 13ms 10 Aug 2021 943rd daveberlin 600 153 16ms 6 Nov 2023 943rd Yewzir 🇧🇪 600 153 13ms 16 Feb 2024 946th msrawson 600 201 24ms 31 Aug 2018 946th ValNyz 600 201 24ms 23 Feb 2022 946th timhaj 🇸🇮 600 201 20ms 28 Aug 2024 946th aalec 600 201 25ms 27 days ago 950th Irratix 🇳🇱 599 225 587ms 9 Jan 2022 951st cmdrsabre 598 253 179ms 6 Feb 2020 952nd Bubbler-4 597 74 4ms 19 Jan 2022 953rd CatsAreFluffy 597 202 30ms 25 Nov 2022 953rd tobeannouncd 597 202 19ms 15 Sep 2023 953rd epic-programmer-guy 597 202 19ms 4 Jan 2024 956th skps2010 596 154 13ms 1 Jan 2019 956th user189032 596 154 16ms 29 May 2019 956th ernestd 596 154 15ms 21 Jan 2021 956th junkondo-jp 596 154 18ms 6 May 2024 960th stefangimmillaro 595 166 71ms 19 Oct 2022 First Prev 881–960 of 1,864 Next Last