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 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 554th DialFrost 🇸🇬 734 125 18ms 26 Sep 2023 554th two-bad 🇬🇧 734 125 22ms 23 Nov 2023 554th dylanarmstrong 734 125 18ms 10 Dec 2023 554th kkoenig 734 125 19ms 23 Dec 2023 554th nsprd 734 125 18ms 18 Jan 2024 554th helbling 🇨🇭 734 125 18ms 21 Mar 2024 554th duckyluuk 🇳🇱 734 125 19ms 3 Oct 2024 554th XenThe 🇬🇧 734 125 17ms 12 Jun 2025 554th acollett89 734 125 17ms 4 Aug 2025 554th iczelia 🇩🇪 734 125 17ms 10 Oct 2025 571st m-tkach 🇺🇦 732 142 571ms 25 Jan 2024 572nd MeWhenI 🇻🇦 731 91 94ms 7 Jul 2024 572nd Steffan153 🇫🇮 731 91 87ms 9 Jul 2024 574th YoungjuneKwon 731 165 23ms 19 Dec 2018 574th neihousaigaai 731 165 20ms 6 Oct 2024 576th prplz 🇦🇺 730 163 396ms 21 Nov 2021 577th DialFrost 🇸🇬 729 112 2,752ms 17 Apr 2025 578th strout 729 200 342ms 16 Aug 2022 579th vang1ong7ang 728 126 19ms 29 Oct 2021 580th MeWhenI 🇻🇦 728 176 8ms 16 Jun 2023 581st primo-ppcg 🇹🇭 726 136 13ms 3 Jul 2023 582nd anter69 🇭🇺 725 125 1,168ms 13 Mar 2025 583rd Yewzir 🇧🇪 725 141 11ms 16 Feb 2024 584th MeWhenI 🇻🇦 725 164 399ms 16 Jun 2023 585th lynn 723 92 96ms 13 Mar 2023 585th sisyphus-ppcg 🇦🇺 723 92 88ms 14 Mar 2023 585th Yewzir 🇧🇪 723 92 79ms 6 Mar 2024 588th ludwig-n 723 167 22ms 6 Apr 2021 589th efgen 722 127 14ms 26 Dec 2023 590th zygoloid 721 187 86ms 11 Aug 2024 591st Indivicivet 720 67 21ms 30 Mar 2021 591st KatieLG 🇬🇧 720 67 21ms 24 May 2021 593rd namelessiw 720 201 548ms 8 Oct 2025 594th TheEric0802 🇩🇪 719 172 17ms 22 Sep 2023 595th jfallon1997 718 168 28ms 15 Aug 2022 595th mathisfun271 718 168 25ms 16 Dec 2023 595th dirckvdende 718 168 24ms 6 Jul 2025 598th boxjelly 718 203 348ms 23 Feb 2021 598th HallMatthew314 718 203 371ms 14 Feb 2022 600th anter69 🇭🇺 717 114 37ms 31 Jan 2022 601st elgan65536 717 229 269ms 28 Mar 2024 602nd DialFrost 🇸🇬 717 367 722ms 17 Apr 2025 603rd nwellnhof 🇩🇪 716 114 706ms 23 Jul 2023 604th annaproxy 715 93 81ms 16 Mar 2023 605th SniperSmiley 🇺🇸 714 169 19ms 29 Jun 2022 606th sean-niemann 🇺🇸 712 167 447ms 10 Jan 2024 607th olivermrose 🇺🇸 711 115 70ms 13 Sep 2021 608th targrik 711 129 45ms 4 Sep 2025 609th Yewzir 🇧🇪 711 219 293ms 5 Jan 2024 610th Yewzir 🇧🇪 710 170 24ms 3 Jun 2024 610th HumanoidCPU 710 170 27ms 31 Oct 2024 610th keelimeguy 🇺🇸 710 170 67ms 17 May 2025 610th Moltres-Galar 🇺🇦 710 170 22ms 28 May 2025 614th MeWhenI 🇻🇦 710 215 56ms 29 Apr 2025 615th adyache 🇺🇸 708 150 86ms 12 Jun 2023 616th jared-hughes 708 181 6ms 18 Jul 2022 617th DialFrost 🇸🇬 707 134 288ms 15 Aug 2024 618th aditsu 706 162 4,462ms 9 Sep 2025 619th TobyBoyne 🇬🇧 706 171 36ms 26 Feb 2021 619th amollberg 🇸🇪 706 171 21ms 18 Jan 2022 619th wuduculfre 706 171 24ms 29 Jul 2025 619th solisolu 706 171 23ms 17 Oct 2025 623rd janbehrens 🇩🇪 705 140 15ms 12 Nov 2023 624th blaztoma 🇱🇹 704 116 82ms 13 Oct 2025 625th billings7 🇬🇧 704 169 389ms 21 Nov 2021 626th angel-p57 🇯🇵 704 238 13ms 18 May 2022 627th commandblockguy 🇺🇸 703 148 515ms 1 Sep 2025 628th primo-ppcg 🇹🇭 703 206 643ms 2 Sep 2020 628th h3ra993huskp 🇯🇵 703 206 576ms 19 days ago 630th minus7 702 172 21ms 24 Feb 2018 630th cubed-guy 702 172 22ms 2 Nov 2022 630th adamnielson42 🇺🇸 702 172 20ms 7 Dec 2023 630th CutSandstone 702 172 18ms 4 Jul 2024 634th stefangimmillaro 702 222 303ms 24 Oct 2023 635th lifthrasiir 🇰🇷 701 63 8ms 30 Nov 2024 636th PatrickStephansen 🇿🇦 700 131 22ms 19 Oct 2020 636th voytxt 🇨🇿 700 131 15ms 20 Jul 2025 638th Betuaredead 699 69 15ms 12 Jan 2023 639th frankgraziano 699 356 222ms 7 Nov 2025 640th SirBogman 🇺🇸 698 117 1,041ms 11 Apr 2024 First Prev 561–640 of 1,864 Next Last