The Calendar hole will go live in approximately 13 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 scpchicken 🇵🇼 657 70 11ms 6 Jan 2023 642nd p-vf 🇨🇭 657 181 403ms 21 Nov 2021 643rd Steffan153 🇫🇮 656 119 597ms 30 May 2024 644th annaproxy 656 222 339ms 1 Aug 2022 645th prestosilver 🇺🇸 655 156 11ms 27 days ago 646th MichalMarsalek 🇨🇿 655 189 452ms 22 Jan 2023 646th DestyNova 🇮🇪 655 189 447ms 15 Apr 2025 648th kmathis22 655 221 560ms 11 days ago 649th jared-hughes 654 97 44ms 16 Apr 2022 650th AlephSquirrel 654 133 21ms 15 Feb 2023 650th jbt 654 133 16ms 25 Dec 2023 652nd clockworknazo 653 140 19ms 27 Feb 2023 653rd stefangimmillaro 653 182 438ms 17 Sep 2024 654th BlankSpruce 651 207 475ms 26 Aug 2022 655th Jonatan6 🇩🇰 650 157 11ms 4 Aug 2023 656th janbehrens 🇩🇪 649 134 13ms 12 Nov 2023 657th HumanoidCPU 649 223 595ms 8 Nov 2025 658th mokymok 🇺🇸 647 133 22ms 23 Jul 2021 658th evan18c 647 133 23ms 27 Apr 2025 660th Shanethegamer 🇺🇸 645 147 36ms 28 Jan 2024 661st emgordon154 645 177 3,952ms 9 Aug 2025 662nd MeWhenI 🇻🇦 644 165 175ms 1 Feb 2024 663rd nsprd 644 209 428ms 19 Jan 2024 664th Fishron 642 134 20ms 21 Oct 2021 665th MeWhenI 🇻🇦 642 159 10ms 25 Aug 2023 666th AlephSquirrel 640 122 479ms 21 Jan 2024 666th JunkIce 640 122 403ms 3 Dec 2024 668th itsh01 640 136 15ms 9 Aug 2021 669th jared-hughes 640 181 6ms 18 Jul 2022 670th JGDoerrer 639 257 185ms 15 Feb 2022 671st jared-hughes 638 211 510ms 24 Jun 2022 672nd emgordon154 635 123 501ms 1 Aug 2024 673rd stefangimmillaro 635 137 16ms 12 Sep 2024 674th MeWhenI 🇻🇦 635 195 825ms 27 Jul 2024 675th xnor-gate 633 136 349ms 4 Dec 2021 675th cingulataluke 633 136 45ms 29 Aug 2023 677th KatieLG 🇬🇧 632 143 1,107ms 17 Nov 2023 678th kkoenig 631 244 292ms 30 Dec 2023 679th okaponta 629 261 185ms 13 Jan 2024 680th davitf 628 137 20ms 28 Jul 2020 681st emplv 🇱🇻 628 245 319ms 29 Apr 2024 682nd tatzyr 🇯🇵 626 97 186ms 18 Dec 2024 683rd MeWhenI 🇻🇦 626 151 32ms 16 Aug 2024 684th nwellnhof 🇩🇪 624 138 19ms 28 Jun 2023 684th minhtrancccp 624 138 19ms 26 Nov 2024 686th edsrzf 🇳🇿 623 64 155ms 3 Feb 2025 687th Lv0Sys 🇵🇱 621 140 14ms 21 days ago 688th Shanethegamer 🇺🇸 621 172 14ms 5 Oct 2024 689th dokutan 621 233 577ms 24 Sep 2025 690th sisyphus-ppcg 🇦🇺 620 98 50ms 25 Sep 2021 691st lifthrasiir 🇰🇷 619 63 8ms 30 Nov 2024 692nd leon-w 619 139 30ms 12 Jul 2019 693rd Yewzir 🇧🇪 618 143 1,108ms 16 Nov 2025 694th chris124567 618 249 315ms 21 Apr 2021 695th jared-hughes 617 141 13ms 10 Sep 2021 695th Andrey-Plotnikov 617 141 12ms 25 Oct 2024 697th MeWhenI 🇻🇦 617 223 1,338ms 16 Jun 2023 698th MeWhenI 🇻🇦 616 66 592ms 28 Jul 2022 699th Seek64 🇩🇪 615 140 27ms 3 Feb 2025 700th bac0id 615 219 404ms 3 Jul 2024 701st Shanethegamer 🇺🇸 615 237 332ms 28 Jan 2024 702nd DialFrost 🇸🇬 614 99 54ms 15 Apr 2025 703rd dcgjb 614 127 3,547ms 16 May 2024 704th Shanethegamer 🇺🇸 614 185 506ms 28 Jan 2024 705th uttumuttu 🇫🇮 613 142 24ms 4 Jan 2022 705th iliazeus 613 142 16ms 3 Sep 2022 705th LukeBridges 🇬🇧 613 142 15ms 28 Oct 2022 705th madeforlosers 613 142 15ms 2 Nov 2023 709th labster 613 161 3,673ms 15 Mar 2018 710th MeWhenI 🇻🇦 613 265 56ms 16 Jun 2023 711th arjanadriaanse 🇳🇱 612 238 348ms 7 Feb 2022 712th janbehrens 🇩🇪 611 186 482ms 24 Mar 2022 713th duckyluuk 🇳🇱 611 187 4,439ms 26 Oct 2024 714th marcin7Cd 610 141 23ms 27 Jun 2020 714th ryyyn 🇺🇸 610 141 21ms 9 Oct 2025 716th dokutan 609 109 96ms 22 Jan 2024 717th mamamia5x 608 143 15ms 8 Mar 2024 718th davidwangd 607 240 361ms 6 Apr 2025 719th bizy-coder 606 142 39ms 22 days ago 720th MeWhenI 🇻🇦 605 163 67ms 3 Jul 2023 First Prev 641–720 of 1,858 Next Last