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 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 555th dmrichwa 🇺🇸 734 125 18ms 16 Apr 2022 555th DialFrost 🇸🇬 734 125 18ms 26 Sep 2023 555th two-bad 🇬🇧 734 125 22ms 23 Nov 2023 555th dylanarmstrong 734 125 18ms 10 Dec 2023 555th kkoenig 734 125 19ms 23 Dec 2023 555th nsprd 734 125 18ms 18 Jan 2024 555th helbling 🇨🇭 734 125 18ms 21 Mar 2024 555th duckyluuk 🇳🇱 734 125 19ms 3 Oct 2024 555th XenThe 🇬🇧 734 125 17ms 12 Jun 2025 555th acollett89 734 125 17ms 4 Aug 2025 555th iczelia 🇩🇪 734 125 17ms 10 Oct 2025 572nd m-tkach 🇺🇦 732 142 571ms 25 Jan 2024 573rd MeWhenI 🇻🇦 731 91 94ms 7 Jul 2024 573rd Steffan153 🇫🇮 731 91 87ms 9 Jul 2024 575th YoungjuneKwon 731 165 23ms 19 Dec 2018 575th neihousaigaai 731 165 20ms 6 Oct 2024 577th prplz 🇦🇺 730 163 396ms 21 Nov 2021 578th DialFrost 🇸🇬 729 112 2,752ms 17 Apr 2025 579th strout 729 200 342ms 16 Aug 2022 580th vang1ong7ang 728 126 19ms 29 Oct 2021 581st MeWhenI 🇻🇦 728 176 8ms 16 Jun 2023 582nd primo-ppcg 🇹🇭 726 136 13ms 3 Jul 2023 583rd MeWhenI 🇻🇦 726 164 399ms 16 Jun 2023 584th anter69 🇭🇺 725 125 1,168ms 13 Mar 2025 585th Yewzir 🇧🇪 725 141 11ms 16 Feb 2024 586th lynn 723 92 96ms 13 Mar 2023 586th sisyphus-ppcg 🇦🇺 723 92 88ms 14 Mar 2023 586th Yewzir 🇧🇪 723 92 79ms 6 Mar 2024 589th ludwig-n 723 167 22ms 6 Apr 2021 590th efgen 722 127 14ms 26 Dec 2023 591st zygoloid 721 187 86ms 11 Aug 2024 592nd Indivicivet 720 67 21ms 30 Mar 2021 592nd KatieLG 🇬🇧 720 67 21ms 24 May 2021 594th namelessiw 720 201 548ms 8 Oct 2025 595th TheEric0802 🇩🇪 719 172 17ms 22 Sep 2023 596th jfallon1997 718 168 28ms 15 Aug 2022 596th mathisfun271 718 168 25ms 16 Dec 2023 596th dirckvdende 718 168 24ms 6 Jul 2025 599th boxjelly 718 203 348ms 23 Feb 2021 599th HallMatthew314 718 203 371ms 14 Feb 2022 601st anter69 🇭🇺 717 114 37ms 31 Jan 2022 602nd elgan65536 717 229 269ms 28 Mar 2024 603rd DialFrost 🇸🇬 717 367 722ms 17 Apr 2025 604th nwellnhof 🇩🇪 716 114 706ms 23 Jul 2023 605th annaproxy 715 93 81ms 16 Mar 2023 606th SniperSmiley 🇺🇸 714 169 19ms 29 Jun 2022 607th sean-niemann 🇺🇸 713 167 447ms 10 Jan 2024 608th olivermrose 🇺🇸 711 115 70ms 13 Sep 2021 609th targrik 711 129 45ms 4 Sep 2025 610th Yewzir 🇧🇪 711 219 293ms 5 Jan 2024 611th Yewzir 🇧🇪 710 170 24ms 3 Jun 2024 611th HumanoidCPU 710 170 27ms 31 Oct 2024 611th keelimeguy 🇺🇸 710 170 67ms 17 May 2025 611th Moltres-Galar 🇺🇦 710 170 22ms 28 May 2025 615th MeWhenI 🇻🇦 710 215 56ms 29 Apr 2025 616th adyache 🇺🇸 708 150 86ms 12 Jun 2023 617th jared-hughes 708 181 6ms 18 Jul 2022 618th DialFrost 🇸🇬 707 134 288ms 15 Aug 2024 619th aditsu 706 162 4,462ms 9 Sep 2025 620th TobyBoyne 🇬🇧 706 171 36ms 26 Feb 2021 620th amollberg 🇸🇪 706 171 21ms 18 Jan 2022 620th wuduculfre 706 171 24ms 29 Jul 2025 620th solisolu 706 171 23ms 17 Oct 2025 624th janbehrens 🇩🇪 705 140 15ms 12 Nov 2023 625th blaztoma 🇱🇹 704 116 82ms 13 Oct 2025 626th billings7 🇬🇧 704 169 389ms 21 Nov 2021 627th angel-p57 🇯🇵 704 238 13ms 18 May 2022 628th commandblockguy 🇺🇸 703 148 515ms 1 Sep 2025 629th primo-ppcg 🇹🇭 703 206 643ms 2 Sep 2020 629th h3ra993huskp 🇯🇵 703 206 576ms 22 days ago 631st minus7 702 172 21ms 24 Feb 2018 631st cubed-guy 702 172 22ms 2 Nov 2022 631st adamnielson42 🇺🇸 702 172 20ms 7 Dec 2023 631st CutSandstone 702 172 18ms 4 Jul 2024 635th stefangimmillaro 702 222 303ms 24 Oct 2023 636th lifthrasiir 🇰🇷 701 63 8ms 30 Nov 2024 637th PatrickStephansen 🇿🇦 700 131 22ms 19 Oct 2020 637th voytxt 🇨🇿 700 131 15ms 20 Jul 2025 639th Betuaredead 699 69 15ms 12 Jan 2023 640th frankgraziano 699 356 222ms 7 Nov 2025 First Prev 561–640 of 1,866 Next Last