The Calendar hole will go live in approximately 10 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 481st yanjs 769 157 20ms 30 Sep 2021 482nd snoozingnewt 🇨🇦 766 180 110ms 8 days ago 483rd tayloia 🇬🇧 765 120 36ms 15 May 2023 484th RyanMHsiao 765 287 1,777ms 25 Sep 2024 485th DialFrost 🇸🇬 764 149 493ms 15 Apr 2025 486th commandblockguy 🇺🇸 764 158 21ms 21 May 2023 486th mediocr3 764 158 22ms 19 Jul 2023 486th Mabeloid 🇳🇴 764 158 21ms 17 Sep 2024 486th andrewjc2000 764 158 19ms 10 Jul 2025 490th KasperKivimaeki 🇫🇮 763 134 8ms 19 Aug 2025 491st MeWhenI 🇻🇦 763 326 104ms 19 Jul 2025 492nd SirBogman 🇺🇸 762 58 8ms 22 Mar 2022 493rd CatsAreFluffy 762 104 62ms 7 Mar 2025 494th GrayJoKing 🇦🇺 761 163 395ms 24 Jul 2025 495th lifthrasiir 🇰🇷 759 72 49ms 30 Nov 2024 496th sean-niemann 🇺🇸 759 130 22ms 30 May 2025 497th PiterAnnema 759 159 27ms 30 Aug 2020 497th Irratix 🇳🇱 759 159 618ms 28 Apr 2022 497th StefanHabel 🇨🇦 759 159 23ms 11 Nov 2022 497th stacksparrow4 759 159 21ms 29 Aug 2023 501st MeWhenI 🇻🇦 758 164 115ms 26 Oct 2022 502nd prplz 🇦🇺 757 135 9ms 19 Apr 2021 503rd solmyr2000 757 178 555ms 19 Jun 2022 504th GolfingSuccess 🇬🇷 756 88 135ms 14 Feb 2025 505th marcin7Cd 756 193 361ms 24 Jan 2021 506th DialFrost 🇸🇬 756 200 561ms 16 Apr 2025 507th SirBogman 🇺🇸 756 202 47ms 16 Apr 2022 508th KatieLG 🇬🇧 754 160 23ms 19 Apr 2025 509th GrayJoKing 🇦🇺 754 170 40ms 22 Jul 2025 510th prplz 🇦🇺 753 179 2,853ms 9 Jan 2022 511th lynn 753 216 179ms 17 Jul 2023 512th edsrzf 🇳🇿 753 218 226ms 22 Jul 2025 513th lukegustafson 🇺🇸 752 122 16ms 16 May 2024 514th ognen98 751 136 10ms 12 Jun 2023 515th AGoyet 750 161 20ms 26 Jul 2022 515th anter69 🇭🇺 750 161 42ms 20 Nov 2023 515th NDR0216 🇹🇼 750 161 20ms 4 Jul 2024 515th zhaohm14 750 161 21ms 6 Jun 2025 519th nat-418 750 165 17ms 3 Nov 2022 520th Shanethegamer 🇺🇸 750 193 531ms 24 Sep 2025 521st Steffan153 🇫🇮 748 132 23ms 8 Aug 2024 522nd snoozingnewt 🇨🇦 748 202 108ms 20 Nov 2025 523rd inventshah 747 153 4,485ms 26 Oct 2024 524th DialFrost 🇸🇬 746 194 535ms 24 Sep 2025 525th Shanethegamer 🇺🇸 745 162 22ms 17 Apr 2022 525th inventshah 745 162 23ms 24 Jan 2023 525th tobyLovick 745 162 21ms 7 Dec 2023 525th plcc0 745 162 22ms 26 Mar 2025 529th Yewzir 🇧🇪 744 159 17ms 16 Oct 2023 530th AdrienHache 🇫🇷 744 160 420ms 25 Aug 2025 531st Shanethegamer 🇺🇸 744 167 115ms 4 Apr 2023 532nd iakolzin 744 181 577ms 30 Jun 2022 533rd prplz 🇦🇺 743 110 65ms 19 Apr 2021 534th janbehrens 🇩🇪 743 128 75ms 21 Jan 2021 535th Stockoh 🇫🇷 743 140 656ms 15 Jun 2024 536th DialFrost 🇸🇬 742 133 24ms 16 Apr 2025 537th jwhear 🇺🇸 742 296 1,805ms 30 Sep 2024 538th justecorruptio 740 124 15ms 14 Apr 2018 539th annaproxy 740 163 20ms 21 Feb 2022 539th duckyluuk 🇳🇱 740 163 46ms 7 Jul 2025 539th ndren 740 163 411ms 19 Oct 2025 539th M4rc0g1 740 163 20ms 22 Nov 2025 543rd flawr 740 197 364ms 1 Mar 2019 544th rucin93 🇵🇱 739 160 53ms 20 Aug 2025 545th tomtheisen 🇺🇸 739 161 416ms 1 Feb 2023 546th snoozingnewt 🇨🇦 738 141 611ms 8 days ago 547th emplv 🇱🇻 737 134 33ms 3 Jun 2024 548th yzhs 🇩🇪 737 198 321ms 24 Jul 2021 548th Natanaelel 🇸🇪 737 198 318ms 2 May 2025 550th mbittner20 736 164 20ms 27 May 2023 551st stefangimmillaro 736 169 109ms 29 Nov 2022 552nd Alex-x90 🇺🇸 736 183 529ms 25 Oct 2023 553rd stefangimmillaro 735 197 548ms 6 Oct 2025 554th p01 734 125 21ms 26 Jan 2018 554th tpiechaczek 🇵🇱 734 125 19ms 29 Jan 2020 554th thisishowmymindworks 🇳🇴 734 125 19ms 5 Oct 2020 554th MeWhenI 🇻🇦 734 125 17ms 14 Jul 2021 554th olivermrose 🇺🇸 734 125 21ms 27 Aug 2021 554th akshatj27 🇦🇶 734 125 18ms 11 Jan 2022 554th dmrichwa 🇺🇸 734 125 18ms 16 Apr 2022 First Prev 481–560 of 1,866 Next Last
