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 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 641st MeWhenI 🇻🇦 659 176 8ms 16 Jun 2023 642nd MeWhenI 🇻🇦 659 249 168ms 1 Feb 2024 643rd scpchicken 🇵🇼 657 70 11ms 6 Jan 2023 644th p-vf 🇨🇭 657 181 403ms 21 Nov 2021 645th Steffan153 🇫🇮 656 119 597ms 30 May 2024 646th annaproxy 656 222 339ms 1 Aug 2022 647th prestosilver 🇺🇸 655 156 11ms 21 Nov 2025 648th MichalMarsalek 🇨🇿 655 189 452ms 22 Jan 2023 648th DestyNova 🇮🇪 655 189 447ms 15 Apr 2025 650th jared-hughes 654 97 44ms 16 Apr 2022 651st AlephSquirrel 654 133 21ms 15 Feb 2023 651st jbt 654 133 16ms 25 Dec 2023 653rd clockworknazo 653 140 19ms 27 Feb 2023 654th stefangimmillaro 653 182 438ms 17 Sep 2024 655th BlankSpruce 651 207 475ms 26 Aug 2022 656th Jonatan6 🇩🇰 650 157 11ms 4 Aug 2023 657th janbehrens 🇩🇪 649 134 13ms 12 Nov 2023 658th HumanoidCPU 649 223 595ms 8 Nov 2025 659th mokymok 🇺🇸 647 133 22ms 23 Jul 2021 659th evan18c 647 133 23ms 27 Apr 2025 661st Shanethegamer 🇺🇸 645 147 36ms 28 Jan 2024 662nd emgordon154 645 177 3,952ms 9 Aug 2025 663rd MeWhenI 🇻🇦 644 165 175ms 1 Feb 2024 664th nsprd 644 209 428ms 19 Jan 2024 665th Fishron 642 134 20ms 21 Oct 2021 666th MeWhenI 🇻🇦 642 159 10ms 25 Aug 2023 667th AlephSquirrel 640 122 479ms 21 Jan 2024 667th JunkIce 640 122 403ms 3 Dec 2024 669th itsh01 640 136 15ms 9 Aug 2021 670th jared-hughes 640 181 6ms 18 Jul 2022 671st JGDoerrer 639 257 185ms 15 Feb 2022 672nd jared-hughes 638 211 510ms 24 Jun 2022 673rd emgordon154 635 123 501ms 1 Aug 2024 674th stefangimmillaro 635 137 16ms 12 Sep 2024 675th MeWhenI 🇻🇦 635 195 825ms 27 Jul 2024 676th xnor-gate 633 136 349ms 4 Dec 2021 676th cingulataluke 633 136 45ms 29 Aug 2023 678th KatieLG 🇬🇧 632 143 1,107ms 17 Nov 2023 679th kkoenig 631 244 292ms 30 Dec 2023 680th okaponta 629 261 185ms 13 Jan 2024 681st davitf 628 137 20ms 28 Jul 2020 682nd emplv 🇱🇻 628 245 319ms 29 Apr 2024 683rd tatzyr 🇯🇵 626 97 186ms 18 Dec 2024 684th MeWhenI 🇻🇦 626 151 32ms 16 Aug 2024 685th nwellnhof 🇩🇪 624 138 19ms 28 Jun 2023 685th minhtrancccp 624 138 19ms 26 Nov 2024 687th edsrzf 🇳🇿 623 64 155ms 3 Feb 2025 688th Lv0Sys 🇵🇱 621 140 14ms 22 days ago 689th Shanethegamer 🇺🇸 621 172 14ms 5 Oct 2024 690th dokutan 621 233 577ms 24 Sep 2025 691st sisyphus-ppcg 🇦🇺 620 98 50ms 25 Sep 2021 692nd lifthrasiir 🇰🇷 619 63 8ms 30 Nov 2024 693rd leon-w 619 139 30ms 12 Jul 2019 694th Yewzir 🇧🇪 618 143 1,108ms 16 Nov 2025 695th chris124567 618 249 315ms 21 Apr 2021 696th jared-hughes 617 141 13ms 10 Sep 2021 696th Andrey-Plotnikov 617 141 12ms 25 Oct 2024 698th MeWhenI 🇻🇦 617 223 1,338ms 16 Jun 2023 699th MeWhenI 🇻🇦 616 66 592ms 28 Jul 2022 700th Seek64 🇩🇪 615 140 27ms 3 Feb 2025 701st bac0id 615 219 404ms 3 Jul 2024 702nd Shanethegamer 🇺🇸 615 237 332ms 28 Jan 2024 703rd DialFrost 🇸🇬 614 99 54ms 15 Apr 2025 704th dcgjb 614 127 3,547ms 16 May 2024 705th Shanethegamer 🇺🇸 614 185 506ms 28 Jan 2024 706th uttumuttu 🇫🇮 613 142 24ms 4 Jan 2022 706th iliazeus 613 142 16ms 3 Sep 2022 706th LukeBridges 🇬🇧 613 142 15ms 28 Oct 2022 706th madeforlosers 613 142 15ms 2 Nov 2023 710th labster 613 161 3,673ms 15 Mar 2018 711th MeWhenI 🇻🇦 613 265 56ms 16 Jun 2023 712th arjanadriaanse 🇳🇱 612 238 348ms 7 Feb 2022 713th janbehrens 🇩🇪 611 186 482ms 24 Mar 2022 714th duckyluuk 🇳🇱 611 187 4,439ms 26 Oct 2024 715th marcin7Cd 610 141 23ms 27 Jun 2020 715th ryyyn 🇺🇸 610 141 21ms 9 Oct 2025 717th dokutan 609 109 96ms 22 Jan 2024 718th mamamia5x 608 143 15ms 8 Mar 2024 719th davidwangd 607 240 361ms 6 Apr 2025 720th bizy-coder 606 142 39ms 23 days ago First Prev 641–720 of 1,860 Next Last