The Calendar hole will go live in approximately 9 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 641st SirBogman 🇺🇸 698 117 1,041ms 11 Apr 2024 642nd inventshah 698 149 556ms 22 Jan 2024 643rd yokasuretsu 698 173 21ms 14 Jan 2025 644th tobeannouncd 698 209 332ms 3 Jan 2024 645th Shanethegamer 🇺🇸 698 233 30ms 22 Feb 2023 646th retrohun 695 137 1,373ms 29 Oct 2019 647th MaxElf999 694 174 26ms 29 Sep 2022 648th jmerle 🇳🇱 693 96 86ms 5 Jul 2023 648th f-tucker 693 96 110ms 19 Dec 2023 650th jared-hughes 693 118 42ms 12 Sep 2022 651st Shanethegamer 🇺🇸 693 150 446ms 17 Jan 2024 652nd HumanoidCPU 693 218 118ms 10 Jun 2024 653rd GrayJoKing 🇦🇺 691 167 144ms 26 Jan 2023 654th AlephSquirrel 690 133 21ms 15 Feb 2023 654th niklv 🇷🇺 690 133 14ms 21 Dec 2023 654th jbt 690 133 16ms 25 Dec 2023 657th LouisRustenholz 690 175 48ms 23 Dec 2021 657th wrose100 690 175 22ms 9 Apr 2022 657th yoavjs 690 175 18ms 1 Apr 2025 657th Babafaba 690 175 21ms 24 Nov 2025 661st duckyluuk 🇳🇱 690 181 61ms 16 Dec 2024 662nd MeWhenI 🇻🇦 689 151 551ms 24 May 2024 663rd acornellier 687 119 77ms 11 Dec 2018 664th DialFrost 🇸🇬 687 155 135ms 24 May 2025 665th mossprescott 686 176 18ms 24 Jun 2019 665th NanduBC 686 176 21ms 17 Mar 2021 665th za3k 686 176 25ms 11 Oct 2022 665th QuincyNash 🇺🇸 686 176 414ms 4 Dec 2022 665th msbranicky 686 176 22ms 27 Jul 2023 665th fkantelberg 686 176 19ms 9 Aug 2023 665th ssbhatt4321 686 176 27ms 14 Oct 2023 665th JorgiEagle 686 176 23ms 8 Feb 2024 665th hiichbindermax 686 176 24ms 11 Sep 2024 674th kimbo 🇺🇸 686 227 313ms 17 Dec 2022 675th fgrosshans 🇫🇷 685 97 82ms 5 May 2023 676th janbehrens 🇩🇪 685 134 13ms 12 Nov 2023 677th MeWhenI 🇻🇦 685 140 143ms 3 Aug 2024 678th timvermeulen 684 221 106ms 19 Jan 2020 679th makononov 684 240 255ms 28 Feb 2025 680th MeWhenI 🇻🇦 683 228 328ms 17 Apr 2023 681st jmerle 🇳🇱 682 177 22ms 20 Jun 2023 681st SB-945 682 177 22ms 3 Mar 2024 681st drochom 682 177 28ms 20 Jun 2024 681st dokutan 682 177 28ms 8 Sep 2025 681st vhoulbreque 🇫🇷 682 177 22ms 13 Sep 2025 681st CaedenHarper 🇨🇦 682 177 42ms 29 Oct 2025 687th KatieLG 🇬🇧 681 120 38ms 16 Nov 2023 688th stefangimmillaro 681 168 4,451ms 10 Nov 2024 688th MeWhenI 🇻🇦 681 168 3,012ms 2 Dec 2024 690th DaCuteRaccoon 680 71 14ms 3 Dec 2022 691st MeWhenI 🇻🇦 680 120 759ms 29 Jan 2023 692nd SirBogman 🇺🇸 680 153 575ms 16 Jan 2024 692nd duckyluuk 🇳🇱 680 153 536ms 7 Jul 2025 694th Yewzir 🇧🇪 680 175 416ms 19 Jun 2024 695th janbehrens 🇩🇪 678 133 1,179ms 1 Nov 2021 696th snooze92 🇫🇷 678 178 19ms 26 Feb 2025 696th milana-94888u 678 178 19ms 5 Mar 2025 696th InigoK 🇺🇸 678 178 24ms 26 Aug 2025 699th edsrzf 🇳🇿 678 180 468ms 22 Jul 2025 700th southpolenator 677 151 10ms 10 Jun 2023 701st southpolenator 677 199 107ms 10 Jun 2023 702nd janbehrens 🇩🇪 676 176 377ms 17 Apr 2025 703rd akshatj27 🇦🇶 675 121 199ms 11 Jan 2022 704th itsh01 675 136 15ms 9 Aug 2021 704th Sam-Vrgl 675 136 15ms 13 May 2025 706th lynn 675 204 1,452ms 24 Oct 2021 707th yzhs 🇩🇪 674 179 29ms 8 Feb 2020 707th urojony 🇵🇱 674 179 22ms 27 May 2021 707th raspofabs 674 179 22ms 8 Jul 2023 707th FranklinJiaChen 674 179 23ms 12 Jun 2024 707th kistlerf 🇨🇭 674 179 37ms 12 May 2025 707th LuisGoncalves05 🇵🇹 674 179 22ms 11 Jul 2025 707th jacekwladzinski 674 179 32ms 8 Oct 2025 714th Ripick 674 184 418ms 12 Jul 2025 715th MeWhenI 🇻🇦 673 141 13ms 11 Nov 2022 716th janbehrens 🇩🇪 673 215 687ms 7 Jan 2022 717th JDiLenarda 🇫🇷 672 205 1,431ms 22 Nov 2023 718th Indivicivet 671 180 22ms 11 Mar 2021 718th cesarm4 671 180 27ms 31 Aug 2021 718th idoweinstein 671 180 28ms 5 Aug 2022 First Prev 641–720 of 1,866 Next Last