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 chars. 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 Chars Time Submitted 801st edsrzf 🇳🇿 573 172 15ms 19 Sep 2024 802nd omurakazuaki 🇯🇵 572 152 13ms 15 Feb 2021 802nd biocommando 🇫🇮 572 152 19ms 19 Aug 2023 802nd hacker112 🇸🇪 572 152 14ms 19 Jun 2024 802nd eTrey13 572 152 13ms 3 Feb 2025 802nd SOONwasTaken 572 152 13ms 1 Oct 2025 807th Daniikk1012 571 111 40ms 3 Nov 2025 808th alemelis 571 135 994ms 19 Sep 2024 809th alphafalfa 571 166 20ms 1 Aug 2025 810th mauro-1 🇮🇹 570 151 21ms 19 Aug 2021 810th prplz 🇦🇺 570 151 1,013ms 5 Oct 2021 810th knutae 🇳🇴 570 151 19ms 30 Nov 2021 810th shelerr 570 151 20ms 4 Jul 2023 810th LandonWeng 570 151 19ms 30 Sep 2025 810th CommandLeo 🇮🇹 570 151 51ms 111 mins ago 816th MeWhenI 🇻🇦 570 155 1,398ms 29 Aug 2025 817th jared-hughes 570 179 10ms 4 Apr 2022 818th sultan 570 254 634ms 15 Apr 2022 819th Ivraj 569 153 13ms 10 Aug 2021 819th daveberlin 569 153 16ms 6 Nov 2023 821st ms0rgn 569 167 205ms 2 May 2018 822nd DialFrost 🇸🇬 567 136 654ms 25 May 2024 823rd rzv-me 567 174 13ms 5 Oct 2024 824th m-tkach 🇺🇦 566 138 571ms 25 Jan 2024 825th NewDefectus 🇮🇱 566 152 19ms 8 Oct 2021 825th stefangimmillaro 566 152 32ms 26 Dec 2022 825th tsidwick 566 152 19ms 20 Dec 2023 825th gallium-gonzollium 566 152 31ms 2 Nov 2024 825th blaztoma 🇱🇹 566 152 18ms 11 Oct 2025 830th ericlangedijk 🇸🇮 566 210 432ms 18 Mar 2022 831st jacobly0 🇺🇸 566 388 1,738ms 22 Apr 2024 832nd user189032 565 154 16ms 29 May 2019 832nd ernestd 565 154 15ms 21 Jan 2021 832nd junkondo-jp 565 154 18ms 6 May 2024 835th Phil-RGOMEGA 565 205 8ms 2 Jun 2023 836th neihousaigaai 565 256 584ms 27 Apr 2021 837th GrayJoKing 🇦🇺 565 296 12ms 11 Aug 2020 838th lacroixjonathan87 564 175 17ms 7 Aug 2020 839th dokutan 564 291 177ms 29 Mar 2025 840th lynn 563 153 834ms 4 Mar 2021 840th test-user1337 563 153 20ms 29 Aug 2023 842nd MattShaile 561 155 16ms 21 Mar 2022 842nd omgmog 561 155 14ms 8 Aug 2022 844th kkoenig 561 182 10ms 23 Dec 2023 845th arctouch-cristiannevianna 561 212 413ms 1 Mar 2024 846th nullie 559 154 28ms 7 Jun 2022 847th jjstreet 559 259 715ms 24 Nov 2020 848th Stockoh 🇫🇷 558 140 656ms 15 Jun 2024 849th MeWhenI 🇻🇦 557 204 568ms 1 Feb 2024 850th anonymaew 555 155 19ms 19 Aug 2023 850th mathb0y512 555 155 19ms 11 Jan 2024 852nd nat-418 554 165 17ms 3 Nov 2022 853rd OllieBoyne 🇬🇧 552 156 24ms 27 Jan 2021 853rd chartung17 552 156 18ms 1 Jan 2024 853rd ZorblaxV 552 156 19ms 10 Jan 2025 856th Shanethegamer 🇺🇸 552 185 11ms 28 Jan 2024 857th dokutan 552 214 20ms 3 Oct 2024 858th keelimeguy 🇺🇸 552 244 476ms 5 Nov 2023 859th neihousaigaai 551 158 15ms 28 Apr 2021 860th Narik1 550 216 420ms 3 Apr 2023 860th postie77 550 216 440ms 19 May 2023 860th JDiLenarda 🇫🇷 550 216 433ms 21 Nov 2023 863rd Narik1 550 280 297ms 3 Apr 2023 864th dokutan 549 261 18ms 3 Oct 2024 865th phfroidmont 549 296 34ms 3 Oct 2023 866th yanjs 548 157 20ms 30 Sep 2021 867th TeodorDyakov 🇧🇬 548 264 487ms 5 Sep 2025 868th MeWhenI 🇻🇦 547 141 425ms 15 Feb 2023 869th somebody1234 547 159 14ms 24 Mar 2018 869th coreynash 547 159 16ms 26 Sep 2023 869th zekestephens 547 159 14ms 25 Oct 2025 872nd BlankSpruce 546 187 10ms 26 Aug 2022 872nd violeta-desantis 546 187 13ms 13 Apr 2024 874th dokutan 545 138 138ms 5 Jun 2025 875th inventshah 545 158 23ms 24 Jan 2023 875th mediocr3 545 158 22ms 19 Jul 2023 875th Mabeloid 🇳🇴 545 158 21ms 17 Sep 2024 875th andrewjc2000 545 158 19ms 10 Jul 2025 879th tomh1012 545 218 374ms 8 Sep 2025 880th RockOfStone 544 213 5ms 22 Dec 2022 First Prev 801–880 of 1,861 Next Last