The Calendar hole will go live in approximately 11 days. Why not try and solve it ahead of time?
Roman to Arabic 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 317th Babafaba 884 89 511ms 23 days ago 317th Yewzir 🇧🇪 884 89 419ms 19 days ago 317th CornerMercury 🇬🇧 884 89 596ms 3 days ago 324th Steffan153 🇫🇮 884 91 151ms 5 Aug 2024 324th sean-niemann 🇺🇸 884 91 140ms 19 May 2025 326th IanUtley 884 124 49ms 27 Apr 2024 327th Steffan153 🇫🇮 883 95 9ms 31 Oct 2023 328th inventshah 882 96 4ms 25 Jan 2023 329th JayXon 🇺🇸 882 129 176ms 25 Sep 2025 330th dvargas46 🇺🇸 881 90 281ms 23 Jan 2023 331st Lydxn 🇨🇦 881 103 419ms 12 Mar 2023 332nd DialFrost 🇸🇬 880 122 5ms 5 Nov 2024 333rd emplv 🇱🇻 879 144 321ms 31 Oct 2023 334th Yewzir 🇧🇪 878 74 1,026ms 15 Nov 2025 335th sean-niemann 🇺🇸 877 103 14ms 8 Apr 2025 336th primo-ppcg 🇹🇭 877 114 39ms 20 Jun 2022 337th btnlq 876 125 27ms 28 Nov 2021 338th Yax42 🇫🇷 875 92 405ms 1 Aug 2025 338th namelessiw 875 92 419ms 19 Aug 2025 340th primo-ppcg 🇹🇭 875 139 42ms 17 Apr 2022 341st dokutan 874 50 183ms 27 Aug 2024 342nd ovs-code 🇩🇪 874 87 13ms 20 Nov 2024 343rd inventshah 874 90 611ms 22 Jan 2024 343rd DialFrost 🇸🇬 874 90 434ms 4 Jun 2024 345th ovs-code 🇩🇪 874 92 147ms 20 Nov 2024 346th edsrzf 🇳🇿 874 96 9ms 29 Jun 2025 347th bstrat 873 43 6ms 4 Sep 2024 348th MeWhenI 🇻🇦 873 123 7ms 11 Sep 2022 348th Shanethegamer 🇺🇸 873 123 7ms 11 Sep 2022 348th sean-niemann 🇺🇸 873 123 7ms 8 Oct 2024 351st nwellnhof 🇩🇪 873 145 277ms 17 Aug 2021 351st stefangimmillaro 873 145 293ms 7 Nov 2023 351st DialFrost 🇸🇬 873 145 256ms 5 Jun 2024 354th scpchicken 🇵🇼 872 81 69ms 4 May 2022 355th Alex-x90 🇺🇸 872 109 21ms 1 Sep 2024 356th inventshah 872 118 72ms 25 Jan 2023 357th nwellnhof 🇩🇪 871 51 40ms 4 Oct 2020 357th SirBogman 🇺🇸 871 51 44ms 1 Sep 2022 359th Steffan153 🇫🇮 871 103 473ms 31 Oct 2023 360th Shanethegamer 🇺🇸 871 106 104ms 24 May 2025 361st sean-niemann 🇺🇸 870 107 444ms 8 Apr 2025 362nd DialFrost 🇸🇬 870 110 102ms 20 days ago 363rd Shanethegamer 🇺🇸 870 113 1,431ms 29 Dec 2023 364th Steffan153 🇫🇮 870 126 24ms 28 Nov 2022 365th m-tkach 🇺🇦 870 146 32ms 31 Oct 2023 366th stefangimmillaro 869 92 106ms 30 Oct 2023 366th kg583 🇺🇸 869 92 3,785ms 9 May 2025 368th Steffan153 🇫🇮 869 112 52ms 20 Feb 2023 369th kumavale 869 131 180ms 22 Nov 2025 370th stefangimmillaro 869 140 42ms 7 Nov 2023 371st Steffan153 🇫🇮 868 103 120ms 12 Dec 2023 372nd Steffan153 🇫🇮 867 142 52ms 6 Jul 2024 373rd primo-ppcg 🇹🇭 867 146 280ms 30 Apr 2020 374th MeWhenI 🇻🇦 866 117 5ms 20 Jul 2023 375th DialFrost 🇸🇬 865 85 4,469ms 21 Nov 2024 376th AlephSquirrel 865 91 537ms 21 Jan 2024 377th ScottHamper 865 93 381ms 23 Feb 2022 377th MeWhenI 🇻🇦 865 93 377ms 26 Jul 2023 379th tayloia 🇬🇧 864 88 14ms 18 Jul 2023 380th Troon 864 110 20ms 27 Aug 2025 381st anter69 🇭🇺 860 67 52ms 31 Jan 2023 381st KatieLG 🇬🇧 860 67 45ms 27 Nov 2023 383rd MeWhenI 🇻🇦 860 93 104ms 30 Oct 2023 383rd CLOStrophobic 🇮🇹 860 93 3,578ms 2 Feb 2025 385th Steffan153 🇫🇮 858 148 31ms 31 Oct 2023 385th Shanethegamer 🇺🇸 858 148 31ms 31 Oct 2023 387th canissimia 🇦🇶 857 183 18ms 29 Nov 2023 388th SirBogman 🇺🇸 856 111 20ms 29 Dec 2021 389th stefangimmillaro 856 133 146ms 7 Nov 2023 389th DialFrost 🇸🇬 856 133 151ms 1 Apr 2025 389th lynn 856 133 157ms 14 Nov 2025 392nd duckyluuk 🇳🇱 855 97 100ms 11 Dec 2024 392nd MeWhenI 🇻🇦 855 97 212ms 10 Jan 2025 394th Steffan153 🇫🇮 855 115 1,426ms 13 Mar 2023 395th Bubbler-4 854 52 42ms 9 Dec 2021 396th kirjavascript 854 89 17ms 13 Feb 2025 397th Shanethegamer 🇺🇸 854 105 530ms 17 Dec 2022 397th Lydxn 🇨🇦 854 105 546ms 12 Mar 2023 399th clockworknazo 853 114 21ms 20 Feb 2023 400th DialFrost 🇸🇬 852 106 8ms 30 Jun 2024 First Prev 321–400 of 1,454 Next Last