The Calendar hole will go live in approximately 2 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 801st DialFrost 🇸🇬 645 140 490ms 25 May 2024 802nd Yewzir 🇧🇪 645 165 174ms 13 Sep 2023 803rd rowboat1 645 187 26ms 3 Apr 2021 803rd rschwa6308 🇺🇸 645 187 59ms 18 Aug 2023 803rd albanian-laundromat 645 187 20ms 24 Apr 2025 803rd bogosorter 645 187 38ms 11 Jul 2025 803rd celiendonze 🇨🇭 645 187 22ms 7 Nov 2025 808th nsprd 645 209 428ms 19 Jan 2024 809th MeWhenI 🇻🇦 643 159 10ms 25 Aug 2023 810th mamamia5x 642 143 15ms 8 Mar 2024 811th Yewzir 🇧🇪 642 162 717ms 21 Feb 2024 811th dokutan 642 162 471ms 8 Sep 2025 813th kevinmchung 642 188 38ms 2 Feb 2018 813th jhfranklin 🇬🇧 642 188 25ms 7 Mar 2021 813th ehulinsky 🇺🇸 642 188 21ms 8 May 2023 813th eiburns 642 188 19ms 3 Oct 2023 813th Just4FunCoder 642 188 38ms 18 Jun 2025 818th mtirado1 641 200 6ms 25 Dec 2022 819th ay2718 639 189 28ms 14 Aug 2019 819th Kloppermand 🇩🇰 639 189 23ms 10 Jun 2020 819th martinnorling 🇸🇪 639 189 22ms 3 Mar 2022 819th ThijsLuttikhuis 639 189 26ms 3 Mar 2024 819th tri1212 🇻🇳 639 189 557ms 30 Jun 2024 819th emgordon154 639 189 31ms 24 Sep 2024 819th Mathrew2012 639 189 19ms 24 May 2025 826th jared-hughes 639 211 459ms 24 Jun 2022 827th kkoenig 639 244 292ms 30 Dec 2023 828th JGDoerrer 639 257 185ms 15 Feb 2022 829th Waffle3z 638 128 62ms 17 Jan 2021 829th hugolgst 638 128 47ms 4 Jun 2021 831st FireyFly 637 144 17ms 14 Apr 2018 831st KrausRaus 🇺🇸 637 144 18ms 23 Oct 2020 831st didion0 🇺🇸 637 144 13ms 22 Apr 2021 831st NewDefectus 🇮🇱 637 144 15ms 8 Oct 2021 831st raphaelimahorn 637 144 13ms 26 Oct 2022 836th emplv 🇱🇻 636 245 319ms 29 Apr 2024 837th LogicalJoe 635 190 34ms 24 May 2023 837th moustave 635 190 32ms 7 Apr 2025 839th Babafaba 634 164 496ms 24 Nov 2025 840th KatieLG 🇬🇧 633 143 1,107ms 17 Nov 2023 841st emgordon154 632 181 2,910ms 9 Aug 2025 842nd garrisonhh 632 191 22ms 21 Nov 2020 842nd geofft 632 191 42ms 10 Dec 2020 842nd CedricGebistorf 632 191 19ms 18 Feb 2022 842nd Educorreia932 632 191 24ms 23 Jun 2022 842nd Ripick 632 191 25ms 6 May 2023 842nd anarconic 632 191 490ms 14 Dec 2023 842nd jeff-re 632 191 20ms 6 May 2025 849th emgordon154 631 152 143ms 15 Nov 2024 850th albanian-laundromat 631 227 12ms 14 Jul 2025 851st MeWhenI 🇻🇦 630 169 175ms 16 Nov 2022 852nd Haksell 🇦🇶 629 130 45ms 5 Apr 2020 852nd Natanaelel 🇸🇪 629 130 44ms 7 May 2025 854th hellwue 629 192 22ms 22 Nov 2023 854th ballaire 629 192 40ms 27 Jan 2024 856th okaponta 629 261 185ms 13 Jan 2024 857th albanian-laundromat 628 141 1,226ms 22 Nov 2025 858th legrottagliegionata 628 146 14ms 7 Dec 2021 859th MarcMush 🇫🇷 627 144 752ms 11 Jan 2024 860th chris124567 626 249 315ms 21 Apr 2021 861st edsrzf 🇳🇿 625 64 155ms 3 Feb 2025 862nd evanrittner 625 193 24ms 9 Mar 2019 862nd argusdusty 🇺🇸 625 193 35ms 31 Dec 2020 862nd Bonjour27891 🇻🇳 625 193 39ms 13 Mar 2022 862nd AtengChen 625 193 23ms 16 Aug 2024 862nd JunkIce 625 193 23ms 4 Nov 2024 867th Phil-RGOMEGA 625 205 8ms 2 Jun 2023 868th dokutan 624 142 1,414ms 8 Sep 2025 869th xyangst 624 147 13ms 26 Sep 2024 870th MeWhenI 🇻🇦 623 199 825ms 27 Jul 2024 871st Shanethegamer 🇺🇸 622 172 14ms 5 Oct 2024 872nd Psirving 622 194 25ms 31 Jul 2020 872nd j-Ewan 622 194 22ms 14 Feb 2022 872nd Dandandooo 622 194 19ms 19 Apr 2025 875th dokutan 621 233 577ms 24 Sep 2025 876th daniel-pedersen 🇸🇪 620 148 17ms 6 Mar 2022 876th stop-amertime 620 148 15ms 5 Dec 2022 878th P-Quentin 🇫🇷 619 195 31ms 5 Aug 2022 878th BREMAUCY 🇫🇷 619 195 22ms 4 Feb 2023 878th cros107 🇦🇺 619 195 25ms 7 Jun 2023 First Prev 801–880 of 1,868 Next Last