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 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 400th prplz 🇦🇺 799 151 1,013ms 5 Oct 2021 400th knutae 🇳🇴 799 151 19ms 30 Nov 2021 400th shelerr 799 151 20ms 4 Jul 2023 400th LandonWeng 799 151 19ms 30 Sep 2025 405th ovs-code 🇩🇪 798 155 35ms 3 Feb 2023 406th sisyphus-ppcg 🇦🇺 796 94 55ms 24 Jun 2022 407th targrik 796 124 181ms 17 days ago 408th Yewzir 🇧🇪 796 157 54ms 24 Dec 2024 409th SirBogman 🇺🇸 795 80 51ms 28 Aug 2022 410th stefangimmillaro 794 114 992ms 23 Feb 2023 411th NewDefectus 🇮🇱 794 152 19ms 8 Oct 2021 411th stefangimmillaro 794 152 32ms 26 Dec 2022 411th blaztoma 🇱🇹 794 152 18ms 11 Oct 2025 411th FortuiteMan 🇫🇷 794 152 23ms 12 days ago 415th SirBogman 🇺🇸 793 103 78ms 5 Oct 2020 416th nwellnhof 🇩🇪 792 129 10ms 30 May 2024 417th sean-niemann 🇺🇸 791 112 960ms 12 days ago 418th ngn 🇧🇬 789 56 5ms 6 Feb 2022 418th bstrat 789 56 4ms 14 Oct 2025 420th lynn 789 153 834ms 4 Mar 2021 420th m-tkach 🇺🇦 789 153 45ms 2 Dec 2022 420th FlorianCassayre 🇫🇷 789 153 19ms 25 Jan 2023 420th test-user1337 789 153 20ms 29 Aug 2023 420th DialFrost 🇸🇬 789 153 21ms 15 Apr 2025 425th Ripick 788 87 57ms 17 Mar 2024 426th Yewzir 🇧🇪 788 171 537ms 16 Feb 2024 427th galloj 🇨🇿 787 95 63ms 22 Jan 2023 428th primo-ppcg 🇹🇭 786 130 10ms 22 Feb 2020 429th Bubbler-4 785 81 39ms 26 Apr 2022 429th rak1507 🇬🇧 785 81 42ms 2 May 2022 431st FlorianCassayre 🇫🇷 784 51 141ms 26 May 2024 432nd Irratix 🇳🇱 784 117 14ms 4 Oct 2020 432nd tomtheisen 🇺🇸 784 117 13ms 31 Oct 2020 432nd solmyr2000 784 117 14ms 10 Jun 2022 432nd Steffan153 🇫🇮 784 117 13ms 26 Jul 2024 436th nullie 784 154 28ms 7 Jun 2022 437th UnderKoen 🇳🇱 784 223 187ms 8 Jul 2024 438th primo-ppcg 🇹🇭 783 152 430ms 21 Nov 2021 438th roavin 783 152 404ms 27 Jul 2023 440th dokutan 783 158 15ms 5 Oct 2025 441st MeWhenI 🇻🇦 783 186 6ms 24 Jul 2023 442nd Shanethegamer 🇺🇸 783 193 129ms 1 Jul 2022 443rd stefangimmillaro 783 195 51ms 26 Apr 2025 444th Kacarott 🇦🇺 781 70 47ms 22 Aug 2024 445th scpchicken 🇵🇼 781 100 66ms 17 Apr 2022 446th MeWhenI 🇻🇦 781 116 1,220ms 13 Nov 2022 447th primo-ppcg 🇹🇭 781 137 16ms 18 May 2023 448th inventshah 780 131 11ms 24 Jan 2023 449th JayXon 🇺🇸 780 146 486ms 5 Mar 2022 450th laikoni 780 187 355ms 10 Jan 2019 451st SirBogman 🇺🇸 779 155 37ms 1 Nov 2022 451st anonymaew 779 155 19ms 19 Aug 2023 451st mathb0y512 779 155 19ms 11 Jan 2024 454th FortuiteMan 🇫🇷 778 62 15ms 7 Oct 2024 455th stefangimmillaro 778 105 71ms 23 Feb 2023 455th gilufin 778 105 81ms 8 Apr 2023 457th elisherer 🇮🇱 778 118 13ms 8 Apr 2019 457th cywong-amino 🇭🇰 778 118 14ms 7 Jul 2020 457th BBoehm 🇩🇪 778 118 13ms 12 Feb 2021 457th prplz 🇦🇺 778 118 17ms 18 Apr 2021 457th ovs-code 🇩🇪 778 118 13ms 18 Nov 2024 462nd HumanoidCPU 778 159 17ms 11 Jun 2024 463rd xsot 🇸🇬 777 127 20ms 19 Apr 2025 464th MeWhenI 🇻🇦 777 339 710ms 10 Feb 2025 465th Jeremy-Stafford 776 188 361ms 29 Mar 2023 466th OllieBoyne 🇬🇧 774 156 24ms 27 Jan 2021 466th jacklynnepenick 774 156 399ms 14 Aug 2021 466th ZorblaxV 774 156 19ms 10 Jan 2025 469th m-tkach 🇺🇦 774 210 31ms 12 Jan 2024 470th DialFrost 🇸🇬 773 153 24ms 16 Apr 2025 470th edsrzf 🇳🇿 773 153 23ms 1 Sep 2025 472nd btnlq 773 155 22ms 4 Dec 2021 473rd RussellEmerine 772 189 328ms 2 Jan 2020 474th blaztoma 🇱🇹 771 119 13ms 4 Oct 2025 475th stefangimmillaro 771 213 170ms 4 Jun 2025 476th neel11235813 770 135 521ms 12 Mar 2024 476th lifthrasiir 🇰🇷 770 135 468ms 2 Dec 2024 478th dokutan 769 52 113ms 6 Apr 2025 479th yanjs 769 157 20ms 30 Sep 2021 480th snoozingnewt 🇨🇦 766 180 110ms 5 days ago First Prev 401–480 of 1,863 Next Last